--- Don’t look down upon Bob. He has his own advantages. --- Oh, yes. ____ others are weak , he is strong.

He expressed a hope _______ he would visit China again the next year, and this was the very hope ________ he would express as soon as he arrived in the country.

_____several times，but unfortunately，the boy still couldn’t smooth away the problem on his own.

Everyone has periods in their lives __________ everything seems very hard.

Ms. Claire is a strict but kind teacher, _____ who, usually, _____ her students.