She asks me to make a kite, but I don’t know _______ to make it.
| A．how | B．what | C．where | D．when |
It is _______ unusual thing for us to find ________ UFO.
| A．a; a | B．an; an | C．a; an | D．an; a |
It takes me two hoursmy homework every day.
| A．doing | B．to do | C．did | D．does |
I often saw the boysin the river.
| A．swam | B．swimming | C．to swim | D．swim |
This math question is too difficult. Can you help me?
| A．work on it | B．work out it | C．work it out | D．work for it |
Mr. Black asks the kids ________ in the river, because it’s too dangerous.
| A．swim | B． to swim | C．not to swim | D．swims |