The story is hard to understand, _____ there are no new words in it.

To my surprise, my good friend _________ stay up to study to prepare for the next important exams organized by ten famous high schools.

ith, why are you always asking me to dothe difficult work—Because you _______ do such a thing and nobody elseis fit for it

Mary broke up with me!—You_ _have forgotten about the Valentine’s Day．

What should we do for the disabled children in the Children’s Home一You’re supposed to a study group to help them.