No ready technical data was ______________，but we managed to go without．
| A．believable | B．convenient | C．available | D．accessible |
I can't understand why he ________ so selfish. He isn't usually like that.
| A．was | B．had been | C．is | D．is being |
Jack decided to risk looking for a place to stay where he arrived, rather than booking ______.
| A．in advance | B．in return | C．in fact | D．in addition |
______ good knowledge of several languages is essential to _____ study of comparative literature because without it one can read books only in translation.
| A．A; the | B．A; / | C．The; the | D．/; the |
I should not have laughed if Iyou were serious.
| A．thought | B．would think | C．had thought | D．have thought |
—Shall I attend my friend's comingofage ceremony, Mum?
—No, unless you see to ________ that you will be home before 1000 PM.
| A．one | B．this | C．it | D．her |