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 |
The changes in our chemistry lab will cost quite a lot, ____ they will save us money in the long run.
| A．or | B．since | C．for | D．but |
The workers were making so much noise in the workshop, and the boss hurriedly went to see ____.
| A．what the matter was | B．what was the wrong |
| C．what wrong was | D．what was the matter |
This is certainly the case, but ____ it is a mistake or not I don’t know.
| A．if | B．even though | C．whether | D．that |
Villagers often say our village is no longer ____ it used to be.
| A．what | B．that | C．which | D．how |
— ____ can I deal with such a situation?
— Take ____ measure you think best.
| A．How; whichever | B．What; whatever |
| C．How; whatever | D．What; whichever |