Children need friends their own age to play with.
| A．of | B．for | C．in | D．at |
-I wonder why Mr Green hasn’t showed up at the meeting yet.
-I’m not sure, but he _______ in a traffic jam driving here.
| A．could be stuck | B．might stuck |
| C．might have been stuck | D．must have stuck |
When I got to the cinema, the film _____ for five minutes.
| A．had begun | B．has been on |
| C．has begun | D．had been on |
Mary had promised to give me a ticket for tomorrow. She failed, ____.
| A．either | B．though | C．but | D．too |
—He must be busy doing his homework right now.
—I imagine____.
| A．that | B．to | C．so | D．it |
After living with his grandparents in the countryside for ten years, the boy returned to the big city ____ his parents worked.
| A．which | B．where | C．that | D．when |