He to school, so he turned off the alarm clock and went back to sleep.
| A．needn’t have gone | B．hasn’t needed to go |
| C．needn’t | D．didn’t need to go |
Sam ______ some knowledge of the computer just by watching others working on it.
| A．brought up | B．looked up | C．picked up | D．set up |
Before the sales start, I make a list of ______ my kids will need for the coming season.
| A．why | B．what | C．how | D．which |
That’s the new machine ______ parts are too small to be seen.
| A．that | B．which | C．whose | D．What |
---Do you think you could do it without help?
---______. This is not the first time for me.
| A．Take care | B．Hurry up | C．Not exactly | D．Don’t worry |
---Perhaps we can’t arrive at the bus station on time．
--- ．We still have forty minutes．
| A．Yes, you are right | B．Not at all |
| C．What a pity | D．Take it easy |