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