问题

, who_________crosstalk, the Chinese comedic tradition, for decades, wants to mix it up with the Western stand-up tradition.
A:will be learning
B:is learning
C:had been learning
D:has been learning;
B:is learning
C:had been learning
D:has been learning;
正确答案是:
同类题型
a great desire to have a home of his own, ______ he had always lived with his grandmother
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