单项选择题

The jungles of the sub-Sahara, afflicted with tse-tse and mosquitos, is an unhealthy are

A．A. requiring inoculation againstB. heated byC. flooded byD. plagued by
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单项选择题
He is constantly late, and ill-prepared when he does finally arrive. He is jeopardizing his future.
A．developing
B．endangering
C．assuring
D．destroying
单项选择题
Serial murderers rarely deviate from a certain type of prey.
A．attacker
B．nourishment
C．victim
D．enemy
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