The population of China is larger than ______ of America.
A. one
B. ones
C. that
D. those
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_____ is our duty to help others.
A. That
B. It
C. This
D. These
Helen often plays with _______ after school.
A. he
B. his
C. him
D. she
Help _____ to some fish, kids.
A. youself
B. yourself
C. youselves
D. yourselves
______ she _____ I know his address. You’d better ask another person.
A. Neither… nor
B. Either…or
C. Both ...and
D. Either …nor