The professor said he could talk on _____ interested the audience.
A. any topic B. which topic
C whichever topic D. the topic he thought it
What you said just now ____ the matter we are discussing.
| A．have something to do at | B．has something to do with |
| C．had something to do with | D．has been something to do with |
A library with five thousand books ______ to the nation as a gift.
| A．is offered | B．has offered | C．are offered | D．have offered |
The teacher，with 6 girls and 8 boys of her class, __________ visiting a museum when the earthquakes truck.
| A．was | B．were | C．had been | D．would be |
Professor Smith，along with his assistants，___________ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
_______you’ve got a chance, you might as well make full use of it.
| A．Now that | B．After | C．Although | D．As soon as |