I ___________ frustrated when I wasn’t sure of the correct answer.
| A．may be | B．used to | C．used to be | D．use to be |
All ______ is needed is a supply of oil.
| A．the thing | B．that |
| C．what | D．which |
Lisa doesn’t know ______ she and her friends can do to help the little boy ______ parents have left their hometown for making money.
| A．that; whose | B．how; who |
| C．what; who | D．what; whose |
I want to know _________ you will come back at 8:00 tomorrow.
| A．that | B．when |
| C．where | D．whether |
This is the most beautiful garden _____ I have ever seen.
| A．which | B．who | C．whom | D．that |
It’s mount Tai lies in Shandong province.
| A．that | B．who | C．what | D．where |