Question

Rising evidence suggests that the use of the vaccines(疫苗)will be effective to    the spread of common cold.

A．interrupt

B．threaten

C．contribute

D．abandon

Answer 1

Ａ

动词辨析。A中断;遮断;阻碍；B威胁；C导致，投稿；D抛弃，放弃；根据句意使用疫苗可以有效的阻碍感冒的传播。