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. |
– _________ do you go to your school library?
– Three times a month
| A．How long | B．How often | C．How much | D．When |
There is ______ “s” and ______ “u” in the word “bus”.
| A．an; a | B．an; an | C．a; an | D．a, an |
一_______ is your home from school?
一Two kilometers．
| A．How far | B．How long | C．How | D．How much |
This time I want to do _______
| A．different something | B．something different |
| C．anything different | D．anything different |
What ______ she ______ for vacation?
| A．does，does | B．is doing | C．is do | D．are doing |