Sally is my best friend, she is always there whenever I’m ___________. —Yeah. A friend in need is a friend indeed.

In the countryside, many left — behind children live with their grandparents and can only see their parents ______ in a year.

ys teachers feel they can’t help every student ________ suitable reading materials, sothey encourage them __________ English on the Internet

The art club is for members only. You can’t go in ____you are a member.

It was at the very beginning _______ Mr. Fox made the decision _____ we should send more fire-fighters there.