A. had known B. would know C. should know D. knew
A do B will do C. did D must do
A. ought accept B. will accept C. accept D. are accepted
A. should hold B. must be held C. would be held D. be held
A. would leave B. leave C. left D. have left
A. sing a song B. sang a song C. sung a song D. singing a song
A. would be B. will be C. was D. be
A. be assigned B. is assigned C. will be assigned D. has been assigned
A. must B. have to C. should D. ought to
A. be prohibited B. will be prohibited C. are prohibited D. ought to be prohibited
A. is B. be C. shall be D. must be
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