1.It is good _______ to help the old and the sick

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1.It is good _______ to help the old and the sick
A.manner B.behave C.ways D.manners
为什么这一题选D?求讲解
2.You won't believe _____ my English _____!
A.how quickly.has improved B.what quickly,is improved C.how quick,has improved D.how quickly,is improced
这一题的答案为什么是D?为什么不能选A?
3.----Could you please help me carry the heavy box?It's too heavy for me _____.
----_____.
A.to carry it;It dosen't matter B.to be carried;Don't mention it.C.to carry;With pleasure D.to carry it;I'd love to.
这一题的答案为什么是C?为什么不能能选D?
4.The man's never hurt any animals.(完成反义疑问句)
The man's never hurt any animals,_____ _____?
求讲解,求翻译

1.manners虽然形式为复数,但是是不可数名词,解释为“习惯,礼貌,风俗,规矩”,而manner解释为方式方法,是可数名词
2.improve是及物动词,而句中improve后未加宾语,所以只能用被动
3.CD的后半格皆对,主要前半格不同,原题中的it指代the heavy box 而不是形式主语,因为如果是形式主语,那句意就变成了“携带这个箱子是很重的”,不对,有前一个it指代了,就不能再出现
4.答案：has he 首先’s肯定是has 和is/was但is和was 都表句意为被动,但实际并非如此,又因为never是否定,反义疑问句必须用肯定

It's good to help children and old people to cross the road. It's good ______ (help) the old. It is _______ to ask the teacher for advice.(help) it is not good() to play on the old people She is _______(致力于) to caring for the sick and needy in her He thinks it his duty to help the sick. helping the old and the weak is a good virtueand( )it is nec the sick man is--- and--- It's good ＿＿children and old people to cross the road A.to h it's his idea to visit and help the old man every weekend什么意 it's very nice () the girl to help the old Is it _______(safety)to cross the river in yhis old boat