第19题: [单项选择]The overall effect of this passage is likely to make the reader feel ______. A. enthusiastic about biotechnology B. very wary about genetic engineering C. reluctant to try new plant combinations D. alarmed about limitless experiments 参考答案:A 答案解析:本题为综合推理题。整篇文章举例说明新的生物技术即基因工程对农业的贡献。显然,作者的态度是积极的。