Speaking of the recently-announced fossil of a juvenile dinosaur, the author implies that
A. it shows vividly how dinosaur flies
B. it brings new mystery to paleontologists
C. it further proves the link between birds and dinosaurs
D. it solves the puzzle of birds" evolution
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When______at the door, she was given a warm welcome.
A. appear
B. appeared
C. appearing
D. appears
English and Chinese______quite different languages.
A. is
B. are
C. was
D. were
Write a letter to your friend Zhang Ailing to convey your congratulations on her admission
驾驶员对客舱广播应将音频选择板上的发射机选择开关置于：
A. PTT
B. VOX/IC
C. SERV
D. Pa
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