Unit 4 Exploring plants
综合检测题
第二部分：英语知识运用（共两节，满分45分）
第一节： 语法和词汇知识（共15小题；每小题1分，满分15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。
21. In the botanical garden we can find a(n) _______ of plants that range from tall trees to small flowers.
A. species B. groups C. amount D. variety
22. This is a very special flower and it can _______ a strong sweet perfume at night.
A. give in B. give up C. give out D. give out
23. If you _______ a mistake in reviewing the report, please bring it to my attention.
A. come along B. come across C. come around to D. come about
