School children must be taught how to deal with dangerous ________.
| A．states | B．conditions | C．situations | D．positions |
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 |
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 without help?
—______. This is not the first time for me.
| A．Take care | B．Hurry up | C．Not exactly | D．Don’t worry |
Whom would you rather ________ with you, Jim or Jack?
| A．have go | B．have to go | C．have gone | D．has to go |
On a rainy day I was riding my bike to pick up my son ___ a terrible accident happened ahead.
| A．who | B．which | C．while | D．when |