John _____ knowledge of radio just by staying around the radio station.
| A．caught on | B．worked up | C．took up | D．picked up |
．Despite the fact that I’ve been told about the local people’s attitude to strangers under no circumstances____________any rudeness.
| A．did I meet | B．I met | C．had I met | D．I had met |
If I can help____________ , I prefer living in Hangzhou because the weather here is better than ____________of Changsha.
| A．that; that | B．it; that | C．that; one | D．it; it |
____________, the car stopped all at once.
| A．Seeing a boy lying on the road |
| B．On seeing a boy sitting on the road |
| C．The minute the driver saw a boy seated on the road |
| D．The driver had seen a boy standing on the road |
Not only I but also Jack and Iris____________ fond of playing basketball.
| A．is | B．am | C．was | D．are |
If____________ , the polluted air can result in deadly diseases or even death.
| A．being breathed in | B．having been breathed in |
| C．breathed in | D．breathing in |