We have been told that under no circumstance ______ the telephone in the office for personal affairs.
| A．may we use | B．we may use | C．we would use | D．did we use |
Most animals and plants are sensitive _______ sudden changes in temperature.
| A．for | B．with | C．to | D．in |
Water, _______ seems so simple and common, is what makes life possible.
| A．that | B．as | C．what | D．which |
You _______ not drive so fast. There is plenty of time.
| A．need | B．could | C．may | D．can |
I will never forget how happy I was when I _______ China again.
A. set feet in B. set foot in C. put foot in D put feet in
_______ great achievements the future may have in store for China, it’s likely that many of them will be born in northwestern Beijing.
| A．However | B．Whatever | C．No matter what | D．No matter |