问题
___ do you play the piano every week?[ ]
A: How
B: How often
C: What time
D: Which time
B: How often
C: What time
D: Which time
正确答案是：
同类题型
George, how can you prove the earth is round?—I can’t, sir. ______, I never said it was.
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Look! What a clean room! Who_______ it?
Don’t the people who are in trouble. We should be friendly to them.