We need to
brush our teeth ___ we sleep. ()
A: before
B: after
brush our teeth ___ we sleep. ()
A: before
B: after
举一反三
- what should we do when we brush our teeth according to the conversation?
- We brush our teeth every night as part of our .（老规矩，惯例）
- We can save water by _________________ (not brush) our teeth under a running tap.
- We should brush our ______ every day. A: tooth B: teeth C: hand D: face
- We should brush our __________ twice a day. A: tooth B: teeth C: tooths D: teeths