_______ the two are only several days apart in age, they seem to belong to wholly different generations.

The little boy was allowed to go swimming _______ he kept near the other boys.

You can not borrow books from the school library______you get your student card.
A,before    B,if       C,while     D,as

Jim didn’t realize his little sister was crying _____ what he had said.

       I toured Jiu Zhai Gou, I was deeply impressed with its beautiful scenery.

Every evening after dinner, _____ tired from work, I will spend some time reading.

My sister will never speak to others like that ________they say something unpleasant to her .

        I toured ZhangJiajie, I was deeply impressed with its beautiful scenery.

They were about to leave       it began to rain.

       I was in trouble,he would come to help me out.