Unit 3 Under the Sea using language课时作业

1. Up till now, there has been no scientific evidence about　　　caused the death of dinosaurs.

A.what is it that B.what it was that C.it was what D.what is it

2. According to The Sun, British scientists have solved the ancient riddle of　　　_____came first-chickens or eggs?

　　A.who B.what C.which D.that

3. In the forest, sound is the best means of communication over distance　　　in comparison with light, it won't be blocked by trees when travelling.

　　A.while B.because C.when D.though

4. -The authority concerned must have taken much stricter measures to ensure traffic safety next year,　　　it?

-Yes, definitely.

　　A.didn't B.mustn't C.hasn't D.won't

5. I suspect　　　Emily was lying when she described the incident, for I know her well.

　　A.whether B.that C.what D.how

6. -Why not ask your sister for help? She is in charge of the group.

-　　　? She always advises me to depend on myself.

　　A.Why me B.What for C.Whybother D.Sowhat

7. I'll soon have to throw away the printer, for it's beyond repair and it's　　　.

　　A.a Herculean task B.on its last legs

　　C.a sacred cow D.over the moon

8. -David, it's Frank. Do you have a few minutes? I need to see you.

-　　　. But I hope "a few minutes" doesn't turn into an hour.

　　A.I'm afraid not B.It doesn't matter

　　C.I don't think so D.I guess so

9. -She's failed her test again.

-　　　! Let's go and give her a hand.