—Mark，you look so tired．
—Oh，I didn’t go to bed________it was 12 o’clock last night．
| A．unless |
| B．after |
| C．until |
| D．as |
Simon is _ a bad mood and doesn’t want to talk to ．
| A．on; anyone | B．in; anyone |
| C．on; someone | D．in; someone |
How happy we were ______ each other!
| A．seeing | B．to see |
| C．saw | D．have seen |
Try to spend as much time as you can___________, please．
| A．on doing your homework | B．speak English |
| C．to take exercise | D．relaxing yourself |
一How many students listened to the teacher carefully enough in the class?
一 ．
| A．Nobody | B．None |
| C．Someone | D．Some one |
Sigmund Friend came to our school to give us a talk yesterday．
Which sentence element is the underlined part?
| A．subject | B．adverbial |
| C．object | D．attributive |