It is not to discuss the questions again and again.
| A．worth | B．worthy | C．worthwhile | D．worthy of |
His younger sister may already be in high school now, in ________ case this picture book is too childish for her.
| A．that | B．which |
| C．whose | D．what |
It is by no means clear ________ the president can do something to end the strike.
| A．whether | B．which |
| C．that | D．what |
Your cousin is said ________ a new computer program recently, but do you know when he will finish it?
| A．to design | B．designing |
| C．to have been designing | D．to have designed |
________ was known to them that the boss had broken his promise ________ he would give them a rise.
| A．What; what | B．It; which |
| C．It; that | D．As; that |
There are many new central leaders in China now, ________ many once worked in the western provinces.
| A．in which | B．of whom |
| C．in whom | D．for whom |