11. Mrs. White found her husband surrounded by letters and papers and _________ very worried
| A．looked | B．looks | C．looking | D．to look |
The little girl felt ________ on hearing the _________ news.
| A．amazed; amazing | B．amazing; amazed |
| C．was amazed; amazing | D．was amazing; amazed |
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 |