All those second-hand goods are sold at before．
| A．30％as lower price as | B．30％as low a price as |
| C．as 30％low price as | D．30％lower price than |
. Could I have a word with you, mum?
— Oh, dear, if you ______.
| A．can | B．may | C．must | D．should |
. All but one _______ take part in the conference ______ tomorrow.
| A．is going to; that is to take place | B．are going to; that is about to take place |
| C．are going to; that is to be taken place | D．are going to; which is to be held |
The fire was finally ______ after the building had ______ for two hours.
| A．put off; caught fire | B．put away; been on fire |
| C．put out; been on fire | D．put out; caught fire |
. Between the two rows of trees ____ the teaching building.
| A．stand | B．stands | C．standing | D．are |
Mary is a lucky girl and she is the only one of the students who______ been to Paris.
| A．have | B．has | C．had | D．is |