The problem is not _____ easy. Think _____ over.
| A．such, it | B．that, it | C．so,不填 | D．that，不填 |
31．Children above 12 are able to take part in skiing or other activities____for them.
| A．having designed | B．designing | C．to design | D．Designed |
30．People aren’t waching____television as before on Christmas Day because they use their videos.
| A．too much | B．too many | C．as much | D．as many |
29．Mr Brown arranged for the taxi to come at six_____she would not have to wait long at the station.
| A．so that | B．even if | C．before | D．Because |
28．He spent much of the evening with Robert Green,____he had hardly seen in the thirty years since they had worked together at CBS.
| A．what | B．that | C．who | D．Whom |
27．At last, the boys found themselves in a pleasant park with trees providing shade and____down to eat their picnic lunch.
| A．to sit | B．sat | C．sitting | D．having sat |