Had I known about this computer program, a huge amount of time and energy .
A．would have been saved
B．had been saved
C．will be saved
D．was saved
_______the thick clouds, you would find the kite in the sky easily.
A. Had it not been for
B. If it were not
C. If it had not been for
D. Were it not for
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
