A：The harder, the better
B：the more hard, the more better
C：The harder, a better
D：more hard, more better
现提供新配制的斐林试剂甲液（0.1g/mLNaOH溶液）、乙液（0.05g/mLCuSO4溶液）、蒸馏水，则充分利用上述试剂及必需的实验用具，能鉴别出下列哪些物质（ ）①葡萄糖 ②蔗糖 ③胰蛋白酶 ④DNA
季风区和非季风区的分界线是____ 。
阅读理解，根据课文信息，写出括号内单词的正确形式
I phoned grandma yesterday, She told me that She and grandpa ____（walk） in the park. They ____（listen）to the music. they ____（talk） with some friends. When they came back home, grandma ____（cook） fish and grandpa cooked noodles. They ____（have） a good time yesterday.
