Experts say ________ to sunlight for too much time will do harm to one’s skin.
A. exposed B. having exposed
C. being exposed D. exposing
—What about the student in your class, Mr. Wang?
—The doctor said that sleep caused him poor memory and poor concentration.
A．lacking of B．lacked in C．lacking D．lack for
Before driving into the city, you are required to get your car ____.
A. washed B. wash
C. washing D. to wash
To avoid on how to use the word, you’d better refer to a dictionary.
A．to get confused B． getting confused
C．to get confusing D． getting confusing
Some insects________the colour of their surroundings to protect themselves.
A. take in B. take off
C. take on D. take out
There is a shortage of teachers in Western China, and it will fall on the 80s and 90s generations to this responsibility.
A. take on B. step up
C. make up D. apply for
