题目内容

下列不被生物膜包被的细胞器是()

A. 线粒体
B. 高尔基体
C. 核糖体
D. 内质网

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We consider it important that everycitizen ______ good manners.

A. has
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--Sorry, I′m late.--That′s OK. You′re here that′s what ______

A. does
B. works
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Nearly a month had gone by ______ theyshowed some sign of giving up the price for which they had held out.

A. until
B. while
C. before
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--What do you think of the performanceof Mike Learns to Rock, the Denmark band --I can′t help ______ it. I got ______whenever I watched it!

A. to love; exciting
B. to love; excited
C. loving; exciting
D. loving; excited

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