下列哪些作物属于异花授粉作物（）。
A、水稻
B、小麦
C、玉米
D、向日葵
E、高粱
参考答案：C, D
Tom urged that he _____ with so much work while his parents went on a snorkeling trip. [ ]
A. was left alone
B. not be left alone
C. will be left alone
D. isn't left alone
A．
B．
C．
D．
