The smoggy weather has made us realize ________ terrible problems we are faced with.
| A．how | B．what |
| C．that | D．which |
---You didn’t lock the back door.
---You are wrong. I ______.
| A．have locked it | B．lock it myself |
| C．did lock it | D．do lock it |
If you don’t know what you want, you might _______ getting something you don't want.
| A．end up | B．pick up |
| C．turn up | D．give up |
I have ______ many different friends ______ it is hard to choose just one best friend.
| A．so; as | B．so; that |
| C．such; as | D．such; that |
I would really appreciate ______ if you can make time in your schedules to attend my lecture today.
| A．that | B．it |
| C．this | D．one |
---Do you know the person our headmaster is talking to.
---Yes. I made his _______ at a party.
| A．remark | B．disagreement |
| C．responsibility | D．acquaintance |