A.It’s；It’sB.Its；ItsC.It’s；ItsA: Whose dog is it? B:（）o……

单项选择题A: Could you sign the register, please? B:（）

A.Yes, please.
B.Yes, of course.
C.No, thank you.

单项选择题That is my CD, and（）are yours.

A.this
B.that
C.those

单项选择题Beijing is（）capital of China. It's（）very big city.

A.a；the
B.the；a
C.a；a

单项选择题She（）work next Monday

A.start
B.starts
C.starting

单项选择题Look at Tom! What（）?

A.does he do
B.is he doing
C.he is doing