[ Time Clause ]
We saw many beautiful bird while we _____ in the lake.
A. are fishing
B. fished
C. were fishing
D. fish

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Tenses › ViewWhen he ___________________ (found) Microsoft, Bill Gates was only 20 years old.
A. found
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C. had found
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They spend their freetime ______ shopping.
A. go
B. going
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She ran __________ a lot of bills at the hotel.
A. by
B. down
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D. up
