Why did Tom keep making jokes about me? I don’t enjoy _____ at.
A. be laughed
B. to be laughed
C. laughing
D. being laughed
Chọn đáp án D
Vitamin C _____ by the human body. It gets into blood stream quickly.
The man died because medical help was not summoneD. A doctor should _____.
Last night a tornado swept through Rockville. It _____ everything in its path.
Today, many serious childhood diseases _____ by early immunization.