根据句意和汉语注释,在答题卡标有题号的横线上,写出单词的正确形式。
We are ____________ (必定地) much richer than we were five years ago.
How useful the ___________ (建议) sound! I think he will take them.
We should do a lot of _________ (研究) on the new medicine before it hits the market.
There is a ______________(普遍的) feeling that this law isn’t working properly.