单项选择题

It was not until 1920 () regular radio broadcast began.

A.that
B.while
C.which
D.since

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单项选择题

John () like to eat fish.

A.looks
B.seemed
C.is
D.does

单项选择题

—I went on a trip to Singapore last month.()

A.So did I, too
B.So went I
C.So did I
D.Sol did I

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