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【单选题】
以下（ ）不是燃烧的基本特征。A.
产生光
B.
放热
C.
产生新的物质
D.
有氧气参与
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皮皮学刷刷变学霸
举一反三
【单选题】I ______ go to bed until I ______ finished my work. a. don’t/had b. didn’t/have c. didn’t/had d. don’t/have
A.
don’t/had
B.
didn’t/have
C.
didn’t/had
D.
don’t/have
【单选题】---- You didn’t do your homework _______, Tom. ---- I’m sorry, mom. But I don’t have ______ for such things.
A.
careful enough; enough time
B.
enough careful; time enough
C.
carefully enough; enough time
【单选题】设int a=3,b=4,c=5,则下面表达式中,值为0的表达式是( )。
【单选题】听力原文：F: Why didn't you phone me? M: Um... I didn't have any change for a pay phone. What did the woman want the man to do?
A.
Get her some change.
B.
Phone her.
C.
Pay the phone bill.
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