__________ snacks and drinks, but they also brought cards for entertainment when they had a picnic in the forest.
| A．Not only they brought |
| B．Not only did they bring |
| C．Not only brought they |
| D．Not only they did bring |
Students ______ to do some voluntary work every year.
| A．were encouraged | B．are encouraged |
| C．encourage | D．encouraged |
You can smoke here ______ you leave a window open to let the smoke out.
| A．even though | B．so that | C．as long as | D．in case |
It is usually cheaper to have the goods ______ by sea than by air.
| A．sent | B．to send | C．sending | D．being sent |
The pianist ______ a love for music when he was a little boy.
| A．develops | B．has developed |
| C．developed | D．had developed |
Jack, look! Everybody is doing homework quietly. ______ you make a noise in class?
| A．Could | B．Shall | C．Will | D．Must |