单项选择题

Pauline failed to catch the flight because______.

A．her ticket was not confirmed
B．she booked her ticket at the wrong place
C．she didn’t have the right documents
D．her visa had run out
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单项选择题
Since joining the European Economic Community in______, Britain has adopted the Community system of agricultural support.
A. 1973
B. 1974
C. 1975
D. 1976
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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