题目内容

--I′m sorry I didn′t do a good job.--Never mind. ______, you have tried yourbest.

Above all
B. In all
C. At all
D. After all

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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

We consider it important that everycitizen ______ good manners.

A. has
B. should be
C. have
D. is

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

A. does
B. works
C. stays
D. counts

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
D. so that