When he looked up，he suddenly found himself ______by a group of teenagers，____looked at him anxiously.
| A．to be surrounded；which |
| B．surrounded；who |
| C．be surrounded；who |
| D．having been surrounded；which |
Mr. Smith didn’t go to the party because he had a lot of experiments _____.
| A．do | B．did | C．done | D．to do |
Only if he gets a job ______ have enough money to build his own house.
| A．he can | B．can he | C．he will | D．did he |
Harry _______ golf after graduation from college.
| A．took up | B．took in | C．took over | D．took down |
---It’s a pity that the trees are going to die.
---_____ more attention, they could have grown better.
| A．Giving | B．Given | C．To give | D．Give |
The peace talk between the two countries _____.
| A．broke up | B．broke down | C．broke off | D．broke into |