Every possible means ___________but no one knows which is suitable .
| A．has discussed | B．have been discussed |
| C．has been discussed | D．were discussed |
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 |
No one was surprised at _____ the examination.
| A．he passing | B．his pass | C．him pass | D．his passing |
Anna spends one hour a day _____ spoken English.
| A．practise | B．to practise | C．on practising | D．in practising |
Dick made it ______ to all his friends.
| A．to know | B．known | C．know | D．knowing |