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1 Medical facilities are being upgraded.

A expanded

B repaired

C improved

D transferred

2 Rock climbing is hazardous

A interesting

B dangerous

C attractive

D useful

3 John is eligible for this job.

A accepted

B recommended

C rejected

D recommended

4 In order to improve our standard of living，we have to accelerate production.

A involve

B decrease

C speed up

D give up

5 Mary looked pale and weary.

A worried

B ugly

C silly

D exhausted

1.答案为C.题句的意思是：医疗设备正在更新。upgrade的意思是“升级，更新”，与improve（改善）意思相近，故C为正确答案。

2.答案为B.hazardous的意思是“危险的”，与dangerous意思相同，故B为正确答案。

3.答案为B.eligible的意思是“合格的，有资格当选的”，与选项B意思相同，故B为答案。

4.答案为c.accelerate的意思是“加速”，与speed up意思相同，故选C.

5.答案为D.本句的意思是：Mary看上去面色苍白，浑身无力。weary的意思是“疲倦 的，萎靡的”，与exhausted意思相近，故选D.