It was not until I came here ________ I realized this place was famous for not only its beauty but also its weather.
| A．who | B．that | C．where | D．before |
The stones each ________ as much as two tons.
| A．weighs | B．are weighed | C．weigh | D．is weighed |
________ to overcome the difficulty，he works day and night．
| A．Determined | B．Determining |
| C．To determine | D．To be determined |
一Did he notice you enter the classroom?
一I don’t think so．He _______ to the radio with his eyes shut·
| A．1istened | B．was listening |
| C．has listened | D．had listened |
I think it’s impolite to play ______ trick on others just for ______ fun
| A．a：＼ | B．＼；a | C．the；＼ | D．a；a |
I have bought two ball pens ,______ writes well.
| A．none of them | B．neither of them |
| C．neither of which | D．none of which |