Dr. Jones ordered ________ for the laboratory.
A. two equipments
B. two pieces of equipments
C. two pieces of equipment
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Every ________ has been tried but without much success.
A. means
B. mean
C. meanings
Beijing, the Capital of China, has ________ now.
A. large populations
B. large population
C. a large population
They have given us a lot of valuable ________.
A. information
B. informations
C. informing
He did ________for his examination.
A. a little prepare
B. little preparation
C. little preparations
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