—____, Tom. Is this your book?
—No, it isn’t. I think it’s ____.
| A．Excuse me; Jack | B．Sorry; Jack’s |
| C．Excuse me; Jack’s | D．Sorry; Jack |
You must concentrate _____ your study not on your clothes.
| A．on | B．with | C．in | D．to |
There are so many beautiful clothes in the store. I really don’t know _____.
| A．what to choose | B．how to choose |
| C．when to choose | D．which to choose |
We all know the _____ of learning English well.
| A．important | B．importance |
| C．different | D．difficult |
The room must _____ up right now. It’s too dirty.
| A．be cleaned | B．be cleaning |
| C．clean | D．cleaned |
, the rain stopped when we went out for a walk.
| A．Lucky | B．Luck | C．Luckily | D．Luckless |