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【单选题】
He has never been to the United Stares,______? [ ]A.
isn't he
B.
doesn't he
C.
hasn't he
D.
has he
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皮皮学刷刷变学霸
举一反三
【简答题】Match the company terms with their definitions
【单选题】Lack of money led the company to a situation _____ they had to decide whether they should keep on with their production.
A.
when
B.
where
C.
that
D.
which
【简答题】在△ABC中，已知A、B、C成等差数列，求tg（ A 2 ）+ 3 tg（ A 2 ）tg（ C 2 ）+tg（ C 2 ）的值．