He was so unwilling to greet me yesterday. I _____ him some way or other.
A. might offend
B. had offended
C. must have offended
D. should have offended
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While _____ mainly for the invention of the telephone, Alexander Graham Bell devoted his life to helping the deaf.
A. remembering
B. remembered
C. to be remembered
D. to be remembering
We should keep them _____ what is going on here.
A. to be informed
B. to inform of
C. informing of
D. informed of
The electric furnace is used extensively to produce the high-grade steel _____ for the manufacture of steel alloys.
A. to be required
B. requiring
C. required
D. that required
Had it not been for his understanding wife Sophia, he might very possibly _____ literature altogether.
A. abandon
B. have abandoned
C. to abandon
D. to have abandoned