all the students in his class，Xiao Ming writes .
| A．Of；very carefully | B．In；the most carefully |
| C．Of；most carefully | D．In；much more carefully |
—I’m sorry I can’t help you.
—.
A. That’s fine B. Thank you C. Thank you all the same
We can’t find pets. Please help us find .
A. our, they B. us, them C. our, them
—_______ do you surf the Internet ?
—Once a month.
| A．How soon | B．How old | C．How often | D．How long |
What’s _______ with her bike?
| A．the matter | B．the wrong | C．matter | D．trouble |
—Must I finish my homework now?
—No, you _______.
| A．mustn’t | B．may not | C．needn’t | D．don’t |