--How long will you stay there?
---_____.
| A．Two and half weeks | B．Two and a half week |
| C．Two weeks and a half | D．A half and two week |
As a new graduate，he doesn't know ________it takes to start a business here.
| A．how | B．what | C．when | D．which |
The snow lasted a week, ________a serious traffic confusion in the whole area.
| A．causing | B．cause | C．to cause | D．caused |
About________of the workers in that steel works________ young people.
| A．thirdfifths; are | B．threefifths; is | C．threefifths; are | D．thirdfifth; are |
--- Did you tell Julia about the result? ---Oh, no, I forgot. I _____ her now.
| A．will be calling | B．call | C．will call | D．am to call |
_____ is known to us all that the sun rises in the east.
| A．As | B．That | C．Which | D．It |