单项选择题

Her behavior is extremely childish.

A. simple
B. immature
C. beautiful
D. foolish
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An important part of the national government is the Foreign Service, a branch of the Department of State.
A. a unity
B. a division
C. an embassy
D. an invasion
单项选择题
The poet William Carlos Williams was a New Jersey physician.
A. doctor
B. professor
C. physicist
D. resident
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