题目内容

It has been five years since this party____. Many people wonder whether it will stay on.
A．has come to powerB．came to powerC．has been in power D．in power
B
考察时态，根据句子结构可知，该处填的是谓语，因此排除D，it has been 时间段 since sb did sth,意为自从某人干某事有多少时间了，因此选择B
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