What a pity. Considering his ability and experience, hebetter.
| A． | need have done | B． | must have done |
| C． | can have done | D． | might have done |
Colour shapes our view of ________ world and it may have ________ fargreater influence on our lives than many of us realize.
| A．a; a | B．the；不填 | C．the; the | D．the; a |
You must do your homework now; you ________ computer games all the evening.
| A．have been playing | B．are playing |
C．play | D．played |
Keep your minds ________ to different ideas, or you will not be successful.
| A．opening | B．to open | C．open | D．opened |
— ________ your brother said to you?
— He encouraged me to talk to foreigners more often.
| A．What it was that | B．What was it that |
| C．How it was that | D．How was it that |
________ you are responsible for the information, you must be very careful.
| A．Unless | B．While | C．Since | D．Though |