21、--- Where did you get your laptop? I’d like to get one．

--- Well, at      shop on Avenue 48, but I can’t say exactly．

A．some         B．any           C．each           D．every

20、I was halfway back to the hospital where the doctor was working      Susan caught up with me．

A．when         B．while         C．until          D．though

19、Because of the Russian gas limit to Europe, attempts       to use botanical fuel as a source of power．

A．have made                                   B．having made

C．are being made                             D．will be making

18、Carbon dioxide      from burning fuels is the most common of the so – called greenhouse gases．

A．producing                                             B．having been produced   

C．to be produced                         D．produced

17、According to news reports personal         of guns in the USA causes a lot of trouble．

A．wealth           B．possession            C．matter          D．problem

16、--- Has Mr. Tom White arrived? 

--- Yes, already．         he wait outside or just come in?

A．Shall           B．May      C．Could            D．Must

15、--- When will you be through with your work, Jones?

---      ? My boss usually finds something for me to do at the last minute．

A．Who knows                                     B．Would you help me

C．I beg your pardon                     D．Anything the matter

14、--- Do you like the place of interest?

--- On the contrary, it’s the        place that I want to visit．

A．worst               B．last          C．best          D．latest