题目内容
（请给出正确答案）
A.Since
B.Unless
C.As
D.Although
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更多“______ he has limited technica…”相关的问题
In the 1980s, the Internet ______.
A．was under research B．began its commercial use
C．had a limited number of users D．caused frequent attacks from viruses
He has his hair cut every month, ______？
A、has he
B、hasn’t he
C、does he
D、doesn’t he
A.take care of
B.catch up with
C.done with
D.paid for
Seldom ______so warmly welcomed.
A. has he been
B. he has been
C. was he
D. he had been
He has a very adult manner although he’s only 12.(英译汉)
A.No, he has never been there
B.No, he never go there
C.No, he never was there
D.No, he has never gone there
