The Australian boy has a good ______of Chinese and can communicate with others freely.
| A．request | B．command | C．demand | D．usage |
These problems, __________, will seriously affect the growth of teenagers and even the nation’s future.
| A．solved properly | B．if solved properly |
| C．not if properly solved | D．if not solved properly |
Should development be stopped________________nature?
| A．in honor of | B．in search of | C．in favor of | D．in memory of |
There is no doubt _________ the world climate has been changing in recent years.
| A．that | B．what | C．if | D．whether |
Much to the couple’s comfort, their income is now double ________ it was five years ago.
| A．that | B．than | C．which | D．what |
Bruce Lee came to America with the ________ of realizing his dream.
| A．attention | B．intention | C．expectation | D．desire |