In the experiment we kept a watchful eye ________ the developments and recorded every detail.
| A．in | B．at |
| C．for | D．on |
The population in our country ____ very ________. 80% of the population ______ farmers.
| A．is, many, are | B．is, large, are |
| C．are, large, are | D．is, much, are |
They want to make _____ clear to the public that they are doing an important and necessary job.
| A．that | B．this | C．it | D．one |
---I want to know if your son will go to the zoo. If your son does, so __________.
--- Well, he is glad to be there.
| A．does | B．he does | C．will mine | D．does mine |
---He spent as much time as he could __________ his spoken English.
--- Wish him good luck !
| A．improve | B．improving | C．to improve | D．improved |
I’m sorry，boy ,you __________see this film. It is for adults only.
| A．ought to | B．can’t | C．won’t | D．don’t |