问题
选择题
31.－What are on show in the museum?
－Some pictures ____ by middle-school students.
A．taking
B．having been taken
C．taken
D．being taken
答案
答案：C
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31.－What are on show in the museum?
－Some pictures ____ by middle-school students.
A．taking
B．having been taken
C．taken
D．being taken
答案：C