It long before we the result of the experiment．
| A．will not be；will know | B．is；will know |
| C．will not be；know | D．is; know |
You are driving too fast. Can you drive_________?
| A．more slowly a bit | B．slowly a bit more |
| C．a bit more slowly | D．slowly more bit |
Have you known Dr. Jackson for a long time?
-Yes, since shethe Chinese Society.
| A． | has joined | B． | joins | C． | had joined | D． | joined |
I like getting up very early in summer. The morning air is so good _________.
| A．to be breathed | B．to breathe | C．breathing | D．being breathed |
The lawyer seldom wears anything other than a suitthe season.
| A． | whatever | B． | wherever | C． | whenever | D． | however |
Let's learn to use the problem we are facinga stepping-stone to future success.
| A． | to | B． | for | C． | as | D． | by |