从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该选项的标号涂黑。
21．—I’ve studied growing plants as one of my interest. Could I make some suggestions?
— .
A．You’ll make it B．Go right ahead
C．Take it easy D．Take your time
22．—What do you think of his work?
—It’s all praise.
A．within B．over C．beyond D．across
