Tell me, Mr. Mentakis, was Mrs. Smith one of your_______ customers?
| A．regular | B．common | C．average | D．usual |
—Is the letter from your mother?
—Yes.But she ________the letter herself，because she doesn’t even know one word.
| A．needn’t have written | B．can’t have written |
| C．might not have written | D．should not have written |
With the loss of labor，the old farmers ________at home had to choose less laborintensive crops.
| A．having left | B．to leave |
| C．left | D．leaving |
—Believe it or not，my sister and I are twins.
—Oh，you must have had the case________you were taken for your sister.
| A．which | B．whose |
| C．where | D．whom |
The tanker，which was full of petrol，________and gave off heavy and dark flames the moment a truck knocked into it.
| A．blew up | B．put up |
| C．turned up | D．brought up |
They agreed to the plan________but there were several details they didn’t like.
| A．in details | B．in order |
| C．in place | D．in principle |