He was ill. _____ is why he didn't attend the meeting.
A.This | B.It | C.There | D.That |
Work hard at your lessons, ______ you’ll fail the exams again.
A.and | B.but | C.or | D.which |
We’ll never forget the days ______ we lived in the country.
A.when | B.where | C.which | D.不填 |
I am sorry I didn’t hear you clearly. _____you repeat it please?
A.Could | B.Must | C.May | D.Need |
—I regret____ to tell ____you that John has been fired.
—I can hardly believe my ears. He is such a fine worker.
A.telling | B.having told | C.to tell | D.to have told |
He failed the mid-term examination and only then________how much time he had wasted.
A.he realized | B.did he realize |
C.he had realized | D.had he realized |