________ about wild plants that they decided to make a trip to Madagascar for further research.
— I haven't seen you for ages! Don't you work in Kaifeng? —__It's years since I worked there.
Mr.White to hospital for an examination yesterday but he was too busy to come.
Modern China is experiencing a completely new period__respect for science and creativity has become the guiding principle of society.
I won't give you any help __ you tell me the truth.It's none of my business
Although he is very young, he is much more experienced than others __working ability.