It's difficult to _______a conversation with someone who only says “yes” and “no”.
—Do you know the most ancient city in China—Xi’an well?—No,this is the first time I ________ here.
Our teacher told us that there ______ no end to learning.
It is said that there are millions of camels in India and _______ of them is growing.
They ask about the things and teachers ______ they still remembered in the school.
I gave the papers to every one of the class, except, of course, the ___________who had already come to the office to collect_________.