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【单选题】
人体氟的主要来源是 下列食品中含氟量最高的是A.
饮水
B.
粮食
C.
空气
D.
蔬菜
E.
肉类
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反馈参考答案：
举一反三
【单选题】If I _______ what the teacher says, I'll go and ask him for help. [ ]
A.
won't understand
B.
am not understand
C.
doesn't understand
D.
don't understand
【单选题】---I hear Mary is in hospital ---Oh, really? I know, I go to visit him.
A.
didn’t, will
B.
didn’t, am going to
C.
don’t, would
D.
don’t, will
【单选题】Don't blame him for this I am responsible ______ what has happened.
A.
in
B.
to
C.
for
D.
with
【单选题】— I telephoned him twice and I couldn't get through to him. — I think that the line might have been out of order, _____ ? [ ]
A.
don't you
B.
wasn't it
C.
mightn't it
D.
hadn't it
【单选题】I am sure I can ______ him into letting us stay in the hotel for the night.
A.
speak
B.
say
C.
talk
D.
tell
【单选题】I _____ to him. He is too serious. [ ]
A.
didn't use to talk
B.
am not used to talking
C.
am not used to talk
D.
didn't use to talking
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