题目内容

The engine seems ________ well.

A. perform
B. to be performed
C. performing
D. to be performing

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To ensure your interview is smooth and ___________, follow these five tips.

A. error-free
B. care-free
C. salt-free
D. tax-free

Meanwhile, the rest of us remain _____________ for discrimination and violence.

A. take risk
B. risking
C. at risk
D. to risk

The plan is designed to _ employees _ work more efficiently.

A. motivate; to
B. motivate; into
C. motivated; to be
D. motivating; on

Being an airline pilot can be a _________ job, but it must be a fun one.

A. stressed
B. stressful
C. relaxing
D. relaxed