Professor Smith and Professor Brown will _____ in giving the class lectures.
| A．exchange | B．alter | C．shift | D．alternate |
Mr.Smith warned his daughter ______ after drinking.
| A．to never drive | B．never driving | C．never to drive | D．never drive |
If you go to Xi’an，you will find the places there more magnificent than commonly ________.
| A．supposing | B．supposed | C．to suppose | D．suppose |
________，he never seems able to do the work beautifully.
| A．Try as he does | B．as he tries | C．Try as does he | D．As he does try |
________ they heard the shout for help，they rushed out.
| A．Immediately | B．The moment | C．The minute | D．All the above |
You should make it a rule to leave things ________you can find them again.
| A．when | B．where | C．then | D．there |