非谓语练习1.The door of the shop remained_C_,though it was ten o'

非谓语练习
1.The door of the shop remained_C_,though it was ten o'clock a.m.
A.opened B.opening C.locked D.having locking为什么要用被动呢?
2.The pilot asked all the passengers on board to remain _C_as the plane was making a landing
A.seat B.seating C.seated D.to be seating 为什么人不是remain doing
3.The responsible teacher couldn't keep his eyes_A_to all those careless mistakes.
A.shut B.to shut C.shutting D.on shutting为什么不是keep doing
4.Do you smell anything unusual?
Yes.I can smell something _A_
A.burning B.is burning C.having burnt D.burnt
我觉得sth在前面的好象感觉要用被动的么
5.Is there anything that you want to buy from town
No,but I'm going to get _A_
A.those letters mailed B.those letters mailing
B.to mail those letters D.mailing those letters
我选了c
6.When little Tom hurried to the classroom,he found many village people _D_at the back of the room.
A.seat B.seating C.to seat D.seated 为什么这里不是find sb doning 呢