There are floors in the building and Mr. Wang lives on the floor.
| A．twelve; twelve | B．twelfth; twelfth |
| C．twelfth; twelve | D．twelve; twelfth |
---I always have difficulty in ________new words.
----Why not _____ your English teacher for help.
| A．pronounce; ask | B．pronounce; to ask |
| C．pronouncing; to ask | D．pronouncing; ask |
.Many people didn’t realize the importance of health _______they have fallen ill.
| A．until | B．while | C．when | D．after |
---Let’s go to Kunming for vocation. It’s _________too hot ________too cold there.
| A．either; or | B．neither; nor |
| C．not only; but also | D．both; and |
----Do you know Robert?
----Yes, He is ________ university student. He likes sports and runs for ___________ hour every morning.
| A．a; a | B．a; an | C．an; an | D．an; a |
Which word of the following doesn’t have the same stress as the others?
A. Usual B. Serious C. Refuse