题干
Where ________ your new pants? ________ on the bed.
A：is, It's
B：are, They are
C：is, They're
D：are, It's
答案(点此获取答案解析）
B
Where ________ your new pants? ________ on the bed.
A：is, It's
B：are, They are
C：is, They're
D：are, It's
,
,则集合
中元素的个数为