[ Grammar ]
Maj Morris asked the airman ________________ been keeping up with her assignments.
A. if she has
B. if she had
C. if had she

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E. expensivest
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The children didn´t went to the school. they _____ sick
A. must been.
B. could have been.
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” Has Mary found a job yet? ”
” I don’t know whether _____ or not. ”
A. she does
B. she has found
C. she found
D. she has