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【单选题】
下述关于break语句的描述中，( )是不正确的。A.
break语句可用于循环体内，它将退出该重循环
B.
break语句可用于switch语句中，它将退出switch语句
C.
break语句可用于对体内，它将退出if语句
D.
break语句在一个循环体内可以出现多次
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【单选题】--- He looks so tired. What’s wrong? --- Nothing serious. He just stayed up last night, ___________his papers.
A.
to prepare
B.
having prepared
C.
prepared
D.
preparing
【简答题】Laura opened the envelope, (fold)______ the letter and began to read it carefully.
【单选题】He ___be over forty years old. He looks so young.
A.
may not
B.
must not
C.
can not
D.
needn't
【单选题】听力原文：M: Lately Greg has been wearing his new leather jacket and he looks so cool. W: Certainly a 180-degree change from his previous style. I almost didn't recognize him. Q: What does the woman mean? ...
A.
Greg used to be so informal in his dress.
B.
Greg used to be very formal in his dress.
C.
Greg is normally not very conscious of his style.
D.
Greg spent 180 dollars on his new leather jacket.
【单选题】Please read the _____ on the bottle of the medicine carefully and pay attention to the amount and the time to take the medicine．
A.
explanations
B.
instructions
C.
introductions
D.
descriptions
【单选题】He ________ be more than thirty------ he looks so young, just like a teenager!
A.
can’t
B.
mustn’t
C.
shouldn’t
D.
may not
【单选题】—Please keep it secret between you and me. —He's ______ known the truth because he looks so unhappy. [ ]
A.
possibly
B.
probably
C.
fairly
D.
very much
【单选题】Professor Smith promised to look()my paper, that is, to read it carefully before the defense.
A.
after
B.
over
C.
into
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