---You don’t seem to be quite yourself today, do you? ---I’m suffering from a cold. Nothing serious, ____.

I can’t say I’m the best. I have only ______ made more efforts than others.

“Facial transplants are no longer science fiction imagination ,”a surgeon has said,____that they are ___possible but  technically complex..

One thing that most organically grown food products seem to have in common is that they cost more than ________ grown foods.

It was very lucky to see the "Monster of Lake Tianchi", ______ we didn't see it clearly.