Both the tenant and the owner share the responsibility of______the safety and cleanliness of the apartment.

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问题 Both the tenant and the owner share the responsibility of______the safety and cleanliness of the apartment.

选项 A、assure
B、assuring
C、assured
D、assures

答案B

解析介词of后面的宾语应为名词形式，因此选动词assure(确保)的动名词形式(B)assuring。(A)和(D)为动词形式，(C)为动词的过去分词，都不能与of搭配。作为参考，应知道the safety and cleanliness of the apartment是assuring的宾语。

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