He looked around and caught a man _____ his hand into the pocket of a passenger.
| A．put | B．to be putting | C．to put | D．putting |
30．QQ,______you can chat with your friends, makes communication easy.
| A．why | B．which | C．that | D．Where |
29．Someone________his car in front of my house and it is blocking my driveway.
| A．has parked | B．is parking | C．parked | D．had parked |
28．The film is very humorous but_________can be enjoyed unless you understand English culture.
| A．everything | B．something | C．nothing | D．Anything |
27．---Your composition is full of mistakes.
---I wish I_________more careful.
| A．would have been | B．had been | C．would be | D．Were |
26．______life began on the earth is one of the biggest puzzles to scientists.
| A．How | B．What | C．Where | D．That |