The old lady did not know ___________when the house caught fire.
| A．how to do | B． what to do |
| C． how to do it | D．what to do it. |
I don’t remember________the book yesterday．
| A．where I put |
| B．where did I put |
| C．where will I put |
| D．where I will put |
—Mum，it’s late．Why are you still here？
—Dad hasn’t come back yet．I________for him．
A．am waiting
B．was waiting
C．waited
They have fun________their homework all the time．
| A．do |
| B．to do |
| C．doing |
| D．to doing |
Thanks for helping me________out that problem．
| A．work |
| B．working |
| C．works |
| D．to working |
The news on TV reported that it would rain________．
| A．heavy |
| B．hardly |
| C．heavily |
| D．big |