—Thank you for your help, Mr. Liu．
—__________．
| A．You're welcome． | B．Don't thank． |
| C．Thanks! You, too． | D．I'm sorry． |
---Do you know second-hand smoke?
---To protect our health and memory.
| A．how we should prevent | B．why should we prevent |
| C．why we should prevent | D．whether we should prevent |
—________？ —He is of medium build and has a big nose.
| A．What does his uncle do |
| B．What does his uncle look like |
| C．What can his uncle do |
| D．What is his uncle doing |
Jim was seen ______ in the library from 3p.m. to 5p.m yesterday.
He is often noticed _____ the library.
| A．reading, to enter | B．to read, to enter into |
| C．reading, enter | D．to read, entering into |
— Did you see Mr. Black just now? —Yes, He ___ his car when I met him.
| A．parked | B．was parking |
| C．parks | D．will park |
--- Do you know the woman ____ is walking on the other side of the street?
--- Oh, that’s my history teacher.
| A．What | B．which | C．who | D．whom |