8 A lot of people could fall ill after drinking contaminated water.
A boiled
B polluted
C mixed
D sweetened
9 You have to be patient if you want to sustain your position
A maintain
B better
C acquire
D support
10 She stood there，trembling with fear.
A jumping
B crying
C moving
D shaking
11 Medical facilities are being upgraded.
A expanded
B repaired
C improved
D transferred
12 Rock climbing is hazardous
A interesting
B dangerous
C attractive
D useful
13 John is eligible for this job.
A accepted
B recommended
C rejected
D recommended
14 In order to improve our standard of living，we have to accelerate production.
A involve
B decrease
C speed up
D give up
15 Mary looked pale and weary.
A worried
B ugly
C silly
D exhausted