| _____ they are listening to the teacher! |
A. How careful B. What careful C. How carefully D. What carefully |
| The water up here should be _____ higher than down-stream (下游). |
A. sixty-five meter B. sixty-fifth meter C. sixty-five meters D. sixty-fifth meters |
| There are a lot _____ vegetables in the supermarket this week than last week. |
A. of B. most C. / D. more |
| His great progress in English made his parents really _______. |
A. happy B. happily C. great D. greatly |
| —When did you become a volunteer? —Two years ago. I _______ this group since then. |
A. have joined in B. have joined to C. have been in D. have been to |
| It was very dark. So he _______ the lights as soon as he entered the room. |
A. turned on B. turned off C. turns on D. turns off |
| Betty bought three T-shirts and _______ of them are red. Red is her favorite color. |
A. either B. both C. none D. all |