(2020原创)We consider our class as a big f________ because we love and care about each other.
(2020原创)Everyone is supposed to take action to make a ________ world, such as walking more and driving less.
A.strange B.green C.quiet D.crazy
(2020 原创)With this new ________， I can learn more new words now.
A.eraser B.dictionary C.pencil D.ruler
(2020原创)I ________ my mom last night, but she didn't answer it. She was very busy.
A.called B.heard C.took D.came
(2020原创)I can't solve this problem. This is the most difficult problem I have ever ________．
A.cost B.gone C.met D.put
(2020原创)My home is not far from our school. So I ________ go to school on foot.
A.never B.seldom C.always D.sometimes
