—You speak very good French! 
—Thanks. I __________ French in Sichuan University for four years.
| A．studied | B．study | C．was studying | D．had studied |
Recently，these companies have ________ some workers becames of the drop in economy.
| A．hired | B．dismissed | C．refused | D．employed |
A good listener takes part in the conversation，________ ideas and raising questions to keep the talk flowing.
| A．realizing | B．copying |
| C．offering | D．misunderstanding |
When the group discussion is nearing its end，make sure to ________ it with important points.
| A．conclude | B．lead | C．avoid | D．hold |
Try not to cough more than you can________since it may cause problems to your lungs.
| A．check | B．allow | C．stop | D．help |
Time is of no importance to great thoughts，________ are as fresh today as when they first passed through thinkers' minds ages ago.
| A．what | B．that | C．which | D．where |