____ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
| A．While | B．As | C．Because | D．If |
It’s time he _________ piano. Don’t you think he has wasted too much time online?
| A．stopped to take up | B．stops taking up |
| C．stopped to leave alone | D．stops leaving alone |
The man pulled out a gold watch, _______ the hands were made of small diamonds.
| A．of which | B．of whom | C．whose | D．of them |
Thecleverboymadeaholeinthewall,_____hecouldsee_____was goingoninsidethe house.
| A．which;what | B．throughwhich;what |
| C．throughthat;what | D．what;that |
---Do you have anything to say for yourself?
---Yes, there is one point ________ I must stick to.
| A．/ | B．when | C．why | D．where |
The thief went into the house at midnight, only ______ by the policemen hiding there.
| A．to catch | B．catching | C．to be caught | D．caught |