What is the main topic of this conversation？
A. Lunch.
B. An exam.
C. A class.
D. A trip.
查看答案
A．tune toB．turn inC．tune atD．turn on
A. tune to
B. turn in
C. tune at
D. turn on
Among the reasons for the Crash of 1929 were ______.
A. unwise speculation by many people
B. dishonest practices by some businessmen
C. strict regulations of the Commodity Exchange Commission
D. both A and B
A．whoB．whereC．thatD．what
A. who
B. where
C. that
D. what
A．electronicallyB．electronicC．electronicsD．electron
A. electronically
B. electronic
C. electronics
D. electron
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