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【单选题】
Careful testing is necessary before any more experiments can continue with the exploring submarine.A.
needful
B.
in need of
C.
necessity
D.
of necessity
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【单选题】—What are you going to do in the 2022 Winter Olympics? —____________________.
A.
I'm going to be a volunteer.
B.
Yes, I have been there.
C.
I am travelling abroad.
【简答题】波形声音文件的扩展名是 (A).txt (B).wav (C).jpg (D).bmp
【简答题】首因效应是指人们根据最初获得的信息所形成的印象不易改变，甚至会左右对后来获得的新信息的解释。根据上述定义，下列各项中属于首因效应的是（ ）。
【单选题】It is reported that Beijing and Zhangjiakou（张家口）will compete to host the 2022 Winter Olympics, which will _____ China’s social development.
A.
interest
B.
benefit
C.
gain
D.
contain
【单选题】The 2022 Winter Olympic Games will be held in _____
A.
Sochi
B.
Vancouver
C.
Beijing
D.
Londong
【单选题】Beijing and Zhangjiakou applying to host the 2022 Winter Olympic Games in 2013.
A.
begin
B.
began
C.
have begun
D.
had begun
相关题目：
【单选题】The 2022 Winter Olympic Games will be held in _____
A.
Sochi
B.
Vancouver
C.
Beijing
D.
Londong
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