- We got here on Tuesday afternoon. -_______ Why didn't you call us earlier'?
| A．Good luck! | B．You did? |
| C．It's no surprise. | D．You are welcome. |
Young people think it _____ great fun to surf_____ Internet.
| A．a; the | B．/; / | C．/; the | D．the; the |
The teacher asked the students.
| A．if they are interested in dinosaurs |
| B．when was Audery Heben born |
| C．What they will do with the computers |
| D．how many trees they had planted |
Alow-carbon(低碳)lifestyle has an effectour daily life.More and more attention has been paid toEnergies these days.
| A．in;save | B．in;saving | C．on;save | D．on;saving |
The teachers _________ the office for a few minutes when we arrived.
| A．had been away from | B．had left |
| C．have been away from | D．have left |
---Mum,_______ I watch TV?
---No. Unless your homework _______________.
| A．could; finishes | B．can; will finish |
| C．may; is finished | D．can; will be finished |