–Which hair band do you like best, madam?
–I can’t decide now. I really don’t know _________.
| A．to choose which one | B．choose which one |
| C．which one to choose | D．which one I should choose it |
If we sit by window of the train, we'll have better view.
| A．/; the | B．/; a |
| C．the; a | D．the; the |
— I’ve decided to give up my job, Mum.
— ___________ You’d better think twice.
| A．Sounds great. | B．What a pity! |
| C．Guess what? | D．Are you serious? |
I found ___________ difficult to make sounds like birds.
| A．that | B．that it is |
| C．it | D．it is |
— Isn’t that book so boring?
—___________. You can know a lot about wild animals.
| A．Yes, you are right | B．I’m afraid so |
| C．Not at all | D．Of course |
Tell Tom ___________ speak when watching the birds.
| A．to try to | B．try not to |
| C．not try to | D．to try not to |