He managed to reach the summit of his career, but it was at the _________ of his health.
| A．consumption | B．credit | C．exhaustion | D．expense |
The police including an officer searching for the murderer in the area the other day.
| A．was | B．are | C．were | D．is |
Alice spent much time _____ the piano each day.
| A．to practice playing | B．practicing playing |
| C．to practice to play | D．practicing to play |
--- You are always full of _____. Can you tell me the secret?
--- Taking plenty of exercise every day.
| A．force | B．energy | C．strength | D．power |
Tom thinks _____ important to get to know his students well.
| A．that | B．it | C．this | D．him |
_____ is known to us all _____ Lu Xun is famous for his great works_____ a great writer.
| A．It; that; for | B．It; that; as |
| C．As; / ; for | D．As; that; as |