Câu 11: The class discussion was short.
B. Moreover
A. However
Câu 12:
A. Since
Câu 13: Our teacher speaks slowly
A. because
B. in order to
Câu 14:
Câu 16:
she spoke slowly, I couldn't understand her.
B. Although
C. If
A. Either... or
Câu 15: You should learn more,
A. otherwise
the blu ...
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