He found very difficult the math problem．
| A．that；to solve | B．this；solving |
| C．it；to solve | D．it；solving |
–Is this your pen? —No, it isn’t. It’s pen.
| A．my | B．her | C．he | D．him |
This is a boy .I don’t know name.
| A．it’s | B．his | C．he’s | D．his’s |
name is Paul. is eight.
| A．She , She | B．He ,His | C．His ,She | D．His, He |
—What are those?-- are baseballs.
| A．Those | B．That | C．It | D．They |
---Is that your watch? ---Yes, ____.
| A．that is | B．that’s | C．it is | D．it’s |