[ Grammar ]
Where ____ they ___________ sleep yesterday?
A. did…… have to
B. did……. has to
C. do…. have to
D. does…. have to

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Grammar › ViewJohn always tells us many ______ jokes, so we all like him.
A. boring
B. bored
C. interesting
D. interested
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There are many planets and stars __________ the universe.
A. across
B. through
C. on
Grammar › ViewThe trip to Berlin will be cancelled ______ more students sign up.
A. in case
B. unless
C. as long as
D. provided that
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They __________ us that we were wrong.
A. convinced
B. persuaded
C. both
