---Why does Peter look upset?--- He is a newcomer to the class and is having difficulty ______ by his classmates.
Noticing some passers-by gathering on the road, Jill looked forward _______ what was the matter.
He is a foreigner and he is not _______like that while he is in China.
He knows it is high time that he ________ at once.
I like_________ when the teacher says that my work is satisfactory ________.
Some of the exercises appear to be ___ ones that you have done, but after taking ___ second look, you will find that they are different.