可不可以说when will you reach

可不可以说when will you reach 可不可以说:When will she come?不加back 为什么? get there 可不可以说成arrive there和reach there 可不可以说DId you erver do sth 可不可以说What are you happy without? arrive的用法arrive无论在什么情况下都要加at或in吗?可不可以说When you arrive,…… haven't dedicded yet .will let you know when I reach when will you ( )nanjing? A arrive B reach C get D gets to When will you ____Wuhan?A arrive B get c reach D go 英语选择 Do you know when they will ( A get to B arrive C reach when they ___,I will call you.A.arrive B.reach C.get to D.ar 可不可以说What colour do you like about?