The boy looked very ______; he must have seen something _____ on the way to school.
| A．frightened ; frightening |
| B．frightened ; frightened |
| C．frightening ; frightened |
| D．frightening; frightening |
The living room is clean and tidy, with a dining table alreadyfor a meal to be cooked.
| A． | laid | B． | laying | C． | to lay | D． | being laid |
The school rules state that no child shall be allowed out of the school during the day, accompanied by an adult.
| A． | once | B． | when | C． | if | D． | unless |
Samsome knowledge of the computer just by watching others working on it.
| A． | brought up | B． | looked up | C． | picked up | D． | set up |
Ihave watched that movie -it'll give me horrible dreams.
| A． | shouldn't | B． | needn't | C． | couldn't | D． | mustn't |
That’s the new machine ______ parts are too small to be seen.
| A．that | B．which | C．whose | D．what |