1) A bird ______ a) is b) are 2) Birds _______ a) is b) are 3) A computer _______ a) is b) are 4) Computers _________ a) is b) are 5) A ball _______ a) is b) are 6) Balls ________ a) is b) are

Unit 2 -2

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?