Rising evidence suggests that the use of the vaccines(疫苗)will be effective to    the spread of common cold.
A．interruptB．threatenC．contributeD．a(chǎn)bandon
Ａ
動詞辨析。A中斷;遮斷;阻礙；B威脅；C導(dǎo)致，投稿；D拋棄，放棄；根據(jù)句意使用疫苗可以有效的阻礙感冒的傳播。
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