—______ are you going to Beijing this summer holiday? —By plane.
| A．When | B．Why | C．Where | D． How |
— Don’t forget to close the door when you leave the room.
— No, I .
| A．don’t | B．won’t | C．mustn’t | D．can’t |
Though I live in the forest . I don’t feel.
| A．lonely, lonely | B．alone, alone | C．alone, lonely | D．lonely, alone |
If there are trees, the air in our city will be cleaner.
| A．less, more | B．more, more | C．more, much | D．much, more |
Will there be more people in 100 years, do you think? , I hope.
| A．No, there isn’t | B．No, there aren’t |
| C．No, there won’t | D．No, they won’t |
He was riding to school it began to rain.
| A．as | B．so | C．while | D．when |