[ Idioms ]
once in a blue moon = ?
A. rarely
B. usually
C. often
D. never

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Perfect Modals › ViewHowever, one of my friends said we ________ (3) checked the movie’s rating before coming, as he wasn’t sure if it was appropriate for all ages.
A. should have
B. could have
C. might have
D. must have
Grammar › View
The men ________ were all office workers.
A. which I talked
B. to those I talked
C. those I talked to
D. I talked to