They regard ____as their duty to keep every workshop clean.
A. this
B. what
C. it
D. that
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Not until last Monday ___to this plan.
A. the manager agreed
B. does the manager agree
C. the manager agrees
D. did the manager agree
I doubt ____the regional director will attend his employee's wedding ceremony.
A. if
B. what
C. that
D. which
By this time tomorrow, I___ you the samples of panel computers.
A. will have sent
B. will send
C. would have sent
D. would not have sent
The new computer has to ____strictly according to tha handbook.
A. be operated
B. be operating
C. operate
D. operated
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