He had to pause from time to time to wipe the sweat from his forehead, because the air—conditioning system ______________.
| A．broke in | B．broke up |
| C．broke out | D．broke down |
相关试题
34. With online course Crazy English has over 20 million students all over China _____the class thro
ugh the Internet.
| A．attending | B．attended | C．attend | D．to be attending |
33. –There were already five people in the car but they managed to take me as well.
--It _____ a comfortable journey.
| A．can’t be | B．shouldn’t be | C．mustn’t have been | D．couldn’t have been |
32. –Why, I couldn’t get you on the phone this morning.
--We _____ tennis in the yard when you called.
| A．must be playing | B．could be playing |
| C．must have played | D．must have been playing |
31. Tom as well as his classmates _____ Japanese in Japan.
| A．are studying | B．have studied | C．studies | D．Study |
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