It is strange that he ______ come solate.— Something unexpected must have happenedto him.

’t seen Sara since she was a little girl, and she changed beyond _____

You will have an idea of what a hard life the working people________at that time after you read the book. [ ]

Do you often e-mail your friends—No. I use WeChat (微信) more often， but I _________ e-mail my friends before.

Would you please help me with my luggage?— Sorry, I ______ it. Mine is even heavier.[ ]