问题
_______do you visit your grandparents?—Almost once a month.[ ]
A: When
B: How soon
C: How often
D: How long
B: How soon
C: How often
D: How long
正确答案是：
同类题型
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Tom needs some help _____his homework. Can you help _____? [ ]
What’re _____ favorite animals?—My favorite animals are dogs.