Turn off the switch ________ anything goes wrong with the ma

Turn off the switch ________ anything goes wrong with the machine.
A.while B.whether C.when D.unless.
为什么不选A呢?
A和C都表示同时,有什么区别呢.
As we ofen see,more people work best in taks alone,_____others work best in groups.
A.when B since C while D beacuse
这道题为什么又不选when那.
I believe ____ you've done your best and _____ things will improve.
A.that,/ B /,/ C.what ,that D / ,that
我选的是B啊
Professor Teagur sat at his desk,_____ over a book.
A reading B bowing C looked D dipping
Do you think there'll be a time ____ we can cure the disease?
A that B which C when D what
为什么不选A呢
I would rather have someone _____ me a loving 'no'than an obligated " yes".
A giving B to give C give D given
have sb 不应该是done么
As everybody knows,arms to the body _____ branches are to a tree.
A what B that C which D as
为什么不选D呢,不是应该用As 一样的意思么
To tell the truth,I think it is you ,_____ Benard,_____ to blame.
A more than,who is B rather than,that are C,other than,that is D less than ,which are
怎么用that
Next time you 're in London ______ us
A to come and visit B to come and visiting C come and visit D come and visiting
怎么会有两个动词啊
________ their inexperience,they've done a good job.
A GIVEN B Supposed C Considered D Concluded
我觉得应该是C
If you can't get in the front door,_____ to the back door.
A GO b TO GO C GOING D to be going
这不要用V.ing
Would you like to have tea or coffee?
A either will do B Neither do I C yes,please D it doesn't matter
为什么不是B
How do you like the curtains?
Well,I'm afraid they don't _____ very well with the wallpaper.
A GO B match C suit D fit
我觉得B也可以啊
May I help you
Yes,I'd like to buy a sports jacket just like _____ he's wearing.
A IT b THE ONE c WHICH D THAT
为什么不选C
If you ____ wait,I'll tell him you've arrived.
A.MUST b SHOULD c WILL d can
怎么会在从句中用将来时
A house built of stone lasts longer than _____ built of wood.
A.ONE B THE ONE C A ONE D THE HOUSE
不应该是C么
Neither side was willing to give in at all.As a result,no agreement _______.
a.was reached b has reached c.had reached.D.had been reached
搞不懂为什么用被动.
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有些地方大小写或者打错的见谅啦、
Thanks...

Turn off the switch ________ anything goes wrong with the machine.
A.while B.whether C.when D.unless.
答案是C while侧重于进行时
As we ofen see,more people work best in taks alone,_____others work best in groups.
答案是C while可表示尽管,相当于although
I believe ____ you've done your best and _____ things will improve.
A.that,/ B /,/ C.what ,that D / ,that
答案是D that引导的宾语从句中,第一个that可以省略,但后面的都不可以省略
Professor Teagur sat at his desk,_____ over a book.
A reading B bowing C looked D dipping
答案是B bow低头,这里用ing形式是作伴随状语
Do you think there'll be a time ____ we can cure the disease?
A that B which C when D what
答案是C 同位语从句啊,time就是后面半句话,when在后半句话中作状语；that会有什么用啊
I would rather have someone _____ me a loving 'no'than an obligated " yes".
A giving B to give C give D given
答案是C have sb do 让某人做某事.看句子啦,不要死盯着某个固定短语!
As everybody knows,arms to the body _____ branches are to a tree.
A what B that C which D as
答案是A A is to B what C is to D.句型 A之于B,就如C之于D.
To tell the truth,I think it is you ,_____ Benard,_____ to blame.
A more than,who is B rather than,that are C,other than,that is D less than ,which are
答案是B 看前面一个空格,应该是rather than（而不是）,那就只能选B了.至于后面的话,可以理解为you是复数
Next time you 're in London ______ us
A to come and visit B to come and visiting C come and visit D come and visiting
答案是C Next time you 're in London 是时间状语,后半句才是主句,是祈使句
________ their inexperience,they've done a good job.
A GIVEN B Supposed C Considered D Concluded
答案是A.given,介词,如果考虑到 C应改成considering
If you can't get in the front door,_____ to the back door.
A GO b TO GO C GOING D to be going
答案是A.If you can't get in the front door是让步状语,后半句才是主句,是祈使句
Would you like to have tea or coffee?
A either will do B Neither do I C yes,please D it doesn't matter
答案是A 两者都可以 B是“我也不是”的意思
How do you like the curtains?
Well,I'm afraid they don't _____ very well with the wallpaper.
A GO B match C suit D fit
答案是A match不需要with
May I help you
Yes,I'd like to buy a sports jacket just like _____ he's wearing.
A IT b THE ONE c WHICH D THAT
答案是B 这题没什么好解释的,怎么说呢,这里又不需要挑选which one
If you ____ wait,I'll tell him you've arrived.
A.MUST b SHOULD c WILL d can
答案是C will可表示愿意（做某事）,自己查字典或者语法书吧
A house built of stone lasts longer than _____ built of wood.
A.ONE B THE ONE C A ONE D THE HOUSE
答案是A one就等于a house
Neither side was willing to give in at all.As a result,no agreement _______.
a.was reached b has reached c.had reached.D.had been reached
答案是A reach an agreement 那agreement当然是“被”reach的啦
呼呼,回答您的问题真累