赞题库-背景图

单项选择题

We found ______ necessary to protect the environment.

A. it

B. this

C. that

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热门试题

单项选择题We are doing much better ______ English ______ our teacher’s help.

A. in; at
B. at; in

C. in; with

单项选择题Hundreds of ______ come to visit Chinese every year.

A. person

B. travellers
C. Japaneses