根据句意和汉语注释，写出单词的正确形式。
____ The famous person often makes some ______________ (演讲)on protecting wild animals.
____ He feels happy by ________ (志愿) to work for the charity.
____ They have no money to afford________________(医学) treatment
____ They are very interested in these ________(发明).
____ He _________(表演) so wonderfully yesterday.
一淀粉酶的产生，促进种子萌发；6一甲基嘌呤是mRNA合成的抑制剂。分别用三组淡剂对种子进行处理：①赤霉素；②赤霉素和脱落酸；③赤霉素和6一甲基嘌呤(6一甲基嘌呤在第1l小时加入，见图中“↓”)。结果如图所示，下列说法不正确的是（ ）