Not until he got to the classroom _ he had left his books in the dormitory.
| A．Martin realized |
| B．realized Martin |
| C．did Martin realize |
| D．had Martin realized |
— Can I look at the menu before I make an order? — Of course. ___________, madam.
| A．Take your time | B．Don’t mention it | C．Never mind | D．Help yourself |
— Could I have a word with you, mum? — Oh, dear, if you ______.
| A．can | B．may | C．must | D．should |
The reason ______ at the meeting for being late was not reasonable.
| A．why he gave | B．what he gave | C．he gave | D．on which he gave |
With the guide _______ the way, we finally got to the village which we were looking for.
| A．led | B．leading | C．to lead | D．had led |
I was about to go to bed _____ one of my old classmates made a call to me.
| A．when | B．as | C．while | D．that |