改良生物调节器下切牙帽的作用（）
A.压底下前牙
B.防止下前牙伸长
C.防止下前牙唇倾
D.A+C
E.B+C
参考答案：E
—Do you think he'll succeed?
—Well, he's helped by so many classmates, what is more, he works extremely hard. So he will _____
succeed. [ ]
A. probably
B. likely
C. possibly
D. perhaps
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