---Whose coats is this?
--- Is it a black one?
---Yes, it is.
---________________.
-- Here you are.
---Thank you very much.
| A．I think it's mine. |
| B．I think it's yours. |
| C．I think it's his. |
| D．I think it's hers. |
Do you often play football _____ here?
A. on B. at C. /
What do you do ______ the weekend?
A. on B. in C. at
I _____ helpful, he ______ helpful, too.
A. is, am B. am, is C. am, are
They ______ lots of places last Friday.
A.visits B.visit C.visited
Lingling is good at ______.
A.sing B.singing C.sings