He was sure that he ______ his wallet in the office.
A. left
B. would leave
C. had left
D. has left
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You must study hard if you ______ want to fail the exam.
A. won’t
B. don’t
C. haven’t
D. hadn’t
"I’m afraid you can’t sit here." "Sorry, I ______ know."
A. don’t
B. can’t
C. won’t
D. didn’t
Over the past 16 years, the population of the Amish People _____ to 230,000 with roughly 5 children per family.
A. had nearly doubled
B. has nearly doubled
C. nearly doubled
D. has nearly been doubling
How was the journey?Tiring. I caught the train at the last second, but all the seats ____. I stood all the way.
A. had been occupied
B. had occupied
C. would occupy
D. would be occupied