It is none of my business. It's up to you to decide he bought yesterday is used for.
| A．what what | B．what that | C．that what | D．that which |
Sparing no thought for her own safety, she dived into the river ______ the child.
| A．saving | B．being saved |
| C．to save | D．to be saved |
Visitors can see the large diamond, ______ has been kept at the Tower since the 17th century.
| A．which | B．that |
| C．what | D．who |
—Sorry, I forgot to lock the door.
—______ Mike can do it later.
| A．No way | B．Take your time |
| C．Nothing serious | D．You're welcome |
—Do you know ____ made him successful in his career?
—Yes. His hard work and determination, of course.
| A．what it was that | B．what was it that |
| C．it was what that | D．was it what that |
With many cities in China dreadfully blanketed by thick haze, the environment problem is _____ Chinese people concern most nowadays.
| A．what | B．which | C．where | D．when |