The answers are:
1. Police gave ... all hope of finding the child.
A. off B.out C. in D.up
2. He couldn't help ... at the sight.
A. to laugh B. to laughing C. laughing D.laugh
3. Some species of animals have become ... in the last hundred years.
A. lost B. disappeared C. missed D. extinct
4. The SDR-4X can move to the ... of the music.
A. beat B. tumble C.lyric D.rhyme
5. We are looking forward ... from you.
A. hear B. to hearing C.to hear D.hearing
6. The camera can ... people's images in its memory.
A. file B.keep C.put D.store
7.Can you ... the difference between the two brothers?
A. speak B. tell C. say D.show
8. It's ... colder today than it was yesterday.You'd better put on your jacket.
A. less B.much C.more D.many
9. I haven't got the ... idea what you're talking about.
A. slightest B.least C.dimmest D.smallest
10. This shirt is made ... cotton.
A. with B.in C.of D. from