With his mother_______ him, he is getting on well with his work.
| A．helping | B．to help | C．help | D．helped |
Anna is often heard ______songs in her room.
| A．sung | B．singing | C．sing | D．to sing |
I went ______a balloon but I didn’t see anyone _____ balloons.
| A．to buy, to sell | B．to buy, selling | C．buying, selling | D．buying, to sell |
This soup is cold; it needs _____.
| A．to heat | B．to be heated | C．being hot | D．heated |
She sat at the desk and set about _____ a letter to her friend.
| A．to write | B．writing | C．write | D．written |
Although swimming is his favourite sport, yet he doesn't like _____ today.
| A．to swim | B．swimming | C．swim | D．to have swim |