_______ necessary for us _______ our environment clean and tidy.
| A．This is; keep |
| B．That’s; to keep |
| C．It’s; to keep |
| D．It’s; keep |
— I have justcup of milk forbreakfast.
—That’s not enough.
| A．a, a | B．the, the |
| C．a, / | D．/ / |
—How many students are there in the classroom?
—. They are all in the lab.
| A．Some | B．None |
| C．All | D．Neither |
—You look worried. What’s your？
—I have trouble learning English.
| A．name | B．question |
| C．problem | D．job |
—Don’t take pictures here, please.
—.
| A．No way | B．Sorry, I won’t |
| C．Here you are | D．It’s a pleasure |
－I hope you’ll have a good jurney.
－.
| A．well done | B．Don’t mention it |
| C．Certainly | D．Thank you very much |