题目内容

We must not _________ or we will be late for school.

A. loiter
B. swirl
C. blink
D. flare up

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His __________ manner branded him a _______________ man.

A. brisk...competent
B. brisk...incompetent
C. queer...steady
D. sound...genuine

For thousands of years, we have looked up at the ___________ night sky and wondered if there were worlds like ours somewhere out there.

A. reddish
B. creaky
C. stellar
D. starry

They hope to _________________ the source of the infection.

A. maketracks
B. takedown
C. track down
D. keep track

He made a generous ___________________ of 50,000 dollars in cash to the library.

A. donate
B. donation
C. contribute
D. collection

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