问题
选择题
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
答案
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。