6. ---- You’ve finished off two pizzas!
---- Yes. But the second is _______ little bit small, so may I have ______ third one?
| A．a; the | B．不填; a | C．不填; the | D．a; a |
Professor Jordon is well known for his _____ into the habits of the common housefly.
| A．examination | B．introduction |
| C．research | D．expression |
. I support your decision, but I should also make it clear that I am not going to be _____ to it.
| A．connected | B．fastened | C．bound | D．stuck |
John _____ knowledge of radio just by staying around the radio station.
| A．caught on | B．worked up | C．took up | D．picked up |
| A．densely | B．soundly | C．loudly | D．noisily |
They did not find _____ to prepare for the worst conditions they might meet.
| A．worth their while | B．it worthwhile |
| C．it worth | D．it worthy |