We can’t go along here because the road _____.
A. is repairing
B. is repaired
C. is being repaired
D. repaires
Chọn đáp án C
Last night a tornado swept through Rockville. It _____ everything in its path.
Vitamin C _____ by the human body. It gets into blood stream quickly.
The man died because medical help was not summoneD. A doctor should _____.
Today, many serious childhood diseases _____ by early immunization.