第一节：单项填空（共20 小题，每小题1 分，满分20 分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1.- Helen and I will have a wedding next month.
-Oh, ____________!
A. go ahead B. you can't be serious
C. that couldn't be better D. congratulations
2. He has a very tolerant_______ towards other cultures.
A. attitude B. award
C. behavior D. extinction
3. The ducks can dive and _____ again several meters away.
A. target B. scare
C. surface D. show
4. His mistake was _________youth and inexperience
A. because B. as C. as a result D. due to
