_______careful you are, ________mistakes you will make.
| A．The more, the more | B．the more, the less |
| C．The more, the fewer | D．the less, the less |
__________ I was talking on the phone, my mother arrived at home.
| A．when | B．until | C．while | D．although |
--- Do you have any plans for this weekend?
--- I am not sure. I ________ go to visit my grandmother.
| A．must | B．need | C．can | D．may |
--- I called you yesterday afternoon, but nobody answered.
---Oh, I ___________ in the playground.
| A．play | B．played |
| C．am playing | D．was playing |
---_______ is the population of your hometown, Lucy?
---It’s about 15,000.
| A．How many | B．How much | C．What | D．How |