—How many _____ are there in your class?
—About 63.
A.childs B.childrens C.children
What ______ at seven yesterday morning?
| A．is she doing | B．was she doing |
| C．did she do | D．does she do |
I was watching TV the lights went off.
| A．when | B．while | C．as | D．for |
Bring a map of China because you _______ want to travel around.
| A．may | B．must | C．need | D．can |
--- do I need to feed the pet dog? ---Twice a day.
| A．How long | B．How much | C．How soon | D．How often |
We don’t understand the passage ______ there are few new words in it.
| A．and | B．if | C．though | D．Because |