[00:37.41]Model:We should plant the trees around the lake.
[01:00.08]The trees should be planted around the lake.
[01:08.86]We must repair the computer now.
[01:37.91]1.Students should correct their mistakes.
[02:17.14]2.We must type the letters this afternoon.
[02:42.30]3.They must clcan their classrooms every day.
[03:08.06]4.Students should speak English in and out of class.
[04:00.82]5.You should hand in your composition the day after tomorrow |