He must have attended the meeting yesterday,___________ he?
| A．didn't | B．mustn't | C．needn't | D．hasn't |
31. To keep safe _______ an earthquake, you should remain at a spot in your room where nothing may fall on you.
| A．in search of | B．in advance of | C．in terms of | D．in case of |
30. —Now the weight. Only 115. You’d better put on a few pounds.
—Well, actually, I ________ like a horse.
| A．ate | B．was eating | C．have been eating | D．will eat |
29. I can hardly remember any occasions _______ I get caught in a traffic jam in our town.
| A．which | B．that | C．where | D．when |
28. —Where have you been all day?
—I _______ some former classmates and I couldn’t get back until it was dark.
| A．have met | B．met | C．would meet | D．had met |
27. The process of producing electricity may also give out CO2, _______ you heat your house with electricity instead of charcoal.
| A．even if | B．as long as | C．as if | D．as soon as |