—Guess what! I have got A for my term paper.
—Great! You ______ read widely and put a lot of work into it.
| A．must | B．should | C．must have | D．should have |
— Did you happen to see _______ black and _______ white cat?
— Are they missing? I told you to take care of them.
| A．a; 不填 | B．the; 不填 | C．the; the | D．a; the |
Many people agree that ______ knowledge of English is a must in _______ international trade today.
| A．the, an | B．a, 不填 | C．the, the | D．不填, the |
As is known to us all, _____ tiger is in _____ danger of becoming extinct.
| A．the, a | B．the, 不填 | C．a, 不填 | D．不填, the |
This is _____ best kind of _____ pen you can get here.
| A．the, the | B．the, a | C．the, 不填 | D．a, the |
How strange! These years my birthday always falls _____.
| A．on the Sunday | B．on a Sunday |
| C．on Sunday | D．at a Sunday |