Friends often help us, especially during the hard time. So we should ________ them for their support.
A.be sorry for B.be thankful to C.be interested in
This year marks Earth Day's 50th birthday. It was created to remind people to ________ the earth — the home to all the living things.
A.talk about B.care about C.hear about
As students, we're supposed to go to the museum often. We can get more knowledge from the things ________.
A.on show B.on sale C.on land
You can bravely tell others what you think if you have different ideas. But ________ remember to choose the proper way.
A.never B.seldom C.always
Swimming is, of course, interesting. But ________ we plan to go swimming, being safe must come first.
A.though B.when C.unless
—In summer vacation, I want to help parents ________ clothes in the square to make some money.
—Good idea. It's also a good chance to know about the society.
A.lend B.give C.sell
