------ Listen! ______.
------ Oh, let’s go to the classroom.
A .There goes the bell. B. There is a bell. C. There the bell go.
--- Could you tell us ______ ?
--- About two weeks.
| A．how often are you going to be away | B．how often we are going to be away |
| C．how long are we going to be away | D．how long we are going to be away |
The first thing ______ we should do is to tell him the mews.
| A．who | B．which | C．that | D．whom |
What way can you think of ______ the mice in the room?
| A．how to kill | B．to kill | C．killing | D．killed |
Yuan Longping, a great person in China, _____as “father of hybrid rice”
| A．is regarded | B．has regarded | C．is regarding | D．regards |
______ the work is difficult, all the workers are keeping on working .
| A．But | B．Although | C．And | D．So |