—Where is the train?—It's ________ the hill.A．down B．up C．at
This old woman _____ have food.A. did B. didn’t C. don’t
When did they _____ ?A. come B. came C. comes
What _____ to you?A. happen B. matter C. happened
What did you _____ ?A. saw B. see C. bought
I usually _____ to the zoo at the weekend.A. went B. go C. came
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