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______ for your help, we' d never have been able to get over the difficulties.

A. Had it not
B. If it were not
C. Had it not been
D. If we had not been

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After ______ for the job, you will be required to take a language test.

A. being interviewed
B. interviewed
C. interviewing
D. having interviewed

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Let me ______ the broken glass before someone walks on it.

A. cover up
B. clear up
C. wash up
D. spring up

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