It's very dangerous __________ football in the street.
| A．play | B．Playing | C．played | D．to play |
Don’t talk to Simon like that. He is just an _______ boy.
| A．eleven years old | B．eleven –years – old |
| C．eleven- year- old | D．eleven years-old |
–We can use it to chat with each other on the Internet.
--Really? Will you please show me _______ it
| A．how to use | B．what to use |
| C．how can I use | D．what can I use |
We _____ in this pool when we were young, but now it _____ fish.
| A．are used to swim; used to keep |
| B．are used to swimming; used to keep |
| C．used to swimming; is used to keep |
| D．used to swim; is used for keeping |
I study math by ____ lots of exercises.
| A．did | B．doing | C．do | D．does |
_______ honest boy he is ! We all like him.
| A．How | B．How a | C．What a | D．What an |