---I failed to catch the early bus because I overslept this morning．
---You_________have stayed up too late last night．
| A．could | B．would | C．should | D．must |
—I’m trying to find yesterday’s newspaper．Have you seen it?
—I’m afraid that I ______ it away．I thought you had finished reading it．
| A．threw | B．had thrown | C．throw | D．will throw |
The boy was so tired that he fell asleep ______ his mother could take off his clothes．
| A．before | B．after | C．while | D．when |
—What’s that noise, John?
—Sorry, Linda．I forgot to tell you．The school library ______．
| A．is rebuilt | B．is being rebuilt | C．was rebuilt | D．has been rebuilt |
The iPhone 4S is Apple’s first major hardware on the market ______ the Oct．5 death of co-founder Steve Jobs．
| A．for | B．to | C．from | D．since |
Don’t bother me．I am listening to the birds ______．
| A．singing | B．sing | C．to sing | D．sung |