He found the boy __________ to a tree in front of the house.
| A．tying | B．tie | C．tied | D．to tie |
---- Have you ever seen a whale alive? ---- Yes, I’ve seen ____.
| A．that | B．it | C．such | D．one |
____ was Jane that I saw in the library this morning.
| A．It | B．He | C．She | D．That |
---- Who’s that? ---- ____ Professor Li.
| A．That’s | B．It’s | C．He’s | D．This’s |
My bike is missing. I can’t find ____ anywhere.
| A．one | B．ones | C．it | D．that |
Your compositions needs __.
| A．improvement | B．to improve | C．improving | D．improved |