We are going to stay there for ______ hour.
An _____ invented this bicycle.A. Chinese B. American C. English
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