Mary is giving me English lessons my teaching her Chinese.
| A．exchange for | B．exchange | C．in exchange for | D．to exchange for |
The boy you lent the pen to _____ it.
| A．break | B．breaking | C．broke | D．to break |
Don't miss the meeting. The questions to be discussed at it _____ of great importance.
| A．is | B．are | C．was | D．will |
In their country the king has _____ power while the government are in charge of most affairs.
| A．his | B．limited | C．limit | D．limited his |
There is a police car in front of the house of our neighbour's. _____ do you think _____ ？
| A．What；has happened | B．What；of happening |
| C．What；of being happened | D．Whatever；of happening |
It's dangerous to let the children who are _____ go swimming in the river.
| A．too young to | B．so young | C．not old enough to | D．so old |