Gun control is a subject ________Americans have argued for a long time,
| A．of which | B．with which | C．into which | D．about which |
13．Many medical scientists are racing__________time to find a cure for H1N1 as soon as possible.
| A．on | B．against | C．for | D．In |
12．Alice is kind, careful, energetic and has much experience of looking after children. In a word, she is very_______.
| A．comfortable | B．flexible | C．available | D．Reliable |
11．--- Where did Mary’s parents 
buy the beautiful souvenir?
--- It was in the same village_________they spent their holidays last year.
| A．that | B．when | C．as | D．Where |
10．____by the beauty of the piano music, the audience almost forgot to applaud when the pianist finally finished it.
| A．Having attracted | B．Attracted | C．To be attracted | D．Be attracted |
9．Young adults generally make their own choices about__________job to take.
| A．what | B．that | C．how | D．Whether |