12: _______ you decided to take up, you should try to make it a success. A: If only B: Unless C: Whenever D: Whatever ...

7: The reason we’re late is __________. A: for the car breaks down B: due to the car breaking down C: that the car broke down D: because the car broke down ...

2: -- What’s the weather usually like here in summer. --________________ A: It’s muggy and damp. B: It’s like sunny. C: It’s freezing. D: It rains. ...

15: I think Father would like to know _______ I've been up so far, so I decided to send him a quick note. A: which B: why C: what D: how ...

10: Although he’s only 16 years old,_______ he has been a college student for two years. A: but B: / C: however D: and ...

5: -- I’m terribly sorry to interrupt, but may I use your phones? It’s rather urgent. -- Yes,（ ）. A: with pleasure. B: no hurry. C: it doesn’t matter. D: of course. ...

3.

7.

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4. The word "horsepower" was first used two hundred years ago. James Watt had made the world's first widely used steam engine. He had no way of telling people exactly how powerful it was, for at that time there were no units for ...