问题
No matter how frequently ________, the works of Beethoven still attract people all over the world.
A:performed
B:performing
C:to be performed
D:being performed
B:performing
C:to be performed
D:being performed
正确答案是：
同类题型
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I’m a little tired. Let’s go to the zoo by taxi.—We ________take a taxi. It’s not far from here.
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