______ the students who took part in the training is 450.
| A．A number of | B．A lot of | C．Lots of | D．The number of |
The reason _______ he is late is _______ there was a breakdown on the railway.
| A．why; why | B．because; that | C．that; because | D．why; that |
As soon as I got on the bus I realized that I________ my papers in the house.
| A．left | B．was leaving | C．had left | D．have left |
I’d like to talk on _____ telephone, but I don’t prefer writing ______ letters.
| A．a; the | B．the; 不填 | C．the; the | D．a; 不填 |
-----Excuse me, could you tell me where I could make a call?
-----Sorry, I’m a stranger here.
-----_____________.
| A．Thanks a lot | B．That’s a pity |
| C．Thanks anyway | D．I’m sorry to hear it |
_________ the extremely hot weather, we continued having classes．
| A．Thanks to | B．In addition to | C．In defence of | D．Regardless of |