--____will you come back?
----In an hour.
| A．How long | B．How often | C．How | D．How soon |
I ___the blackboard, but I can’t ______a word.
| A．look, see | B．look at, see | C．see, look | D．see, look at |
The word “fish” has ____“s”.
| A．an | B．a | C．the | D．/ |
The man__________blue is Mr. White.
| A．on | B．of | C．in | D．at |
There are some birds___________the tree.
| A．of | B．to | C．on | D．in |