单项选择题

Most embedded clauses require an introductory word called a subordinator, such as "that, until, before, ______," and so on.

A．so
B．if
C．for
D．but
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单项选择题
The draft of the Declaration of Independence was written by ______.
A．John Adam
B．George Washington
C．Benjamin Franklin
D．Thomas Jefferson
单项选择题
Which of the following words is NOT formed through clipping
A．Dorm.
B．Motel.
C．Gent.
D．Zoo.
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