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【单选题】
注册商标每次续展注册的有效期为（）年。A.
10
B.
15
C.
20
D.
25
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反馈参考答案：
举一反三
【单选题】When she heard the ring, Sharon reached for the phone. 'Call an ambulance!' she heard Kevin saying _________ a choking voice.
A.
at
B.
by
C.
in
D.
with
【单选题】— I heard that there were a lot of shouts and screams at yesterday’s party. It must have been terrible. — Oh, no. ________, I enjoyed every minute.
A.
On the contrary
B.
In the end
C.
As a result
D.
On the other hand
【单选题】. She insisted that she ______ somebody in the house.
A.
should hear
B.
heard
C.
hear
D.
was heard
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