Too high house prices can be brought under control，__________the authorities introduce a series of regulatory policies．
| A．even if | B．as if | C．so that | D．provided that |
Advertisements are a good __________ sell products or services.
| A．means to | B．way of | C．way to | D．approach to |
Violence (暴力) computer games may have a bad ____________ on children.
| A．affect | B．pressure | C．influence | D．power |
Mary is often heard ________ playing piano in the next room in the evening.
| A．practise | B．to practise | C．practising | D．practiced |
What has started as a Chicago morning program in 1984 has now turned into one of the most popular daytime chat shows ever _____ on TV.
| A．tobe seen | B．tosee | C．seeing | D．has been seen |
In the UK, what impressed exchange students most was the Student Activity, ______ they could get lots of information outside.
| A．where | B．that | C．which | D．when |