Pleaseknockatthedooryoucomeint

Please knock at the door ________ you come into the room.

A．before

B．after

C．until

D．while

登录免费查看答案和解析

相关试题

-- Mom, when shall we go to Dongying Museum this weekend?
-- Oh, sorry. I'm going to Beijing for a meeting. ___Saturday __ Sunday is OK.

A．Neither, nor	B．Both, and
C．Either, or	D．Not only, but also

收藏答案/解析

—Listen ! Helen is singing in the next room.
It ____ be Helen. She has gone to Beijing.

A．can’t

B．mustn’t

C．may

D．neen`t

收藏答案/解析

The presidents of China and the USA had ________ interview a short time ago.
—And it was ________ great success.

A．an; /

B．the; a

C．an; a

D．the; /

收藏答案/解析

The children are having fun ________ on the playground.

A．to play

B．play

C．playing

D．played

收藏答案/解析

We are supposed to ___________a solution to stop people from looking down at their mobile phones while driving cars.

A．come up with	B．come from
C．come out	D．come true

收藏答案/解析