问题
选择题
15. --- Who are the teenagers gathering at the school gate?
--- Well, if you _____ know, they are all my visiting students.
A．need
B．must
C．may
D．Will
答案
B
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15. --- Who are the teenagers gathering at the school gate?
--- Well, if you _____ know, they are all my visiting students.
A．need
B．must
C．may
D．Will
B