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6. By the time he arrives here tomorrow, they_
_for London.
C. will left
_English at our school for 20 years before he retired last year.
A. would have left
B. will have left
D. are leaving
7. Mr. Pike
A. had been teaching
C. was teaching
8. They
A. will be leaving
9. When I
A. got/had left
10. I was angry when you saw me because I
A. have been arguing
B. has been teaching
D. is teaching
_for Japan at 10.30 tomorrow.
B. have left
C. will have left
D. will leave
_to the airport, I realized that I
B. got/left
_my passport at home.
C. had got/had left
_with my sister.
D. got/was left
B. had been arguing C. argued
D. would argue