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4. Television, ______ came into being in 1939, did not become common until the early 1950s.
A. that
B. what
C. which
D. it
5. Many car accidents occur _______ drunk driving.
A. due to
B. thanks to
C. because
D. for
6. Finally after working hard for five years Jane ______ able to save her fare to Europe.
A. is
B. was
C. will be
D. would be
7.when we reached the cinema, the film _____ started, for there were no people at the entrance.
A. should have
B. ought to have
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