The room _____ every day.
A. must clean B. must be cleaning C. must be cleaned D. is cleaning
The lost dog _____ early this morning.
A. find B. found C. is found D. was found
---Do you like the flower? ---Yes, it _____ sweet.
A. smells B. smelt C. is smelt D. smelling
That’s a nice watch! Is it _____ in China?
A. make B. makes C. made D. making
It’s difficult for a foreigner _____ in Chinese.
A. write B. to write C. writes D. written
The teacher made the students _____ in their classroom.
A. study B. studying C. to study D. studies
