You must look carefully ______ you cross the road .
A: before
B: after
C: and
D: but
A: before
B: after
C: and
D: but
举一反三
- ___ you go across the road, you must be careful. A: Since B: After C: When D: Before
- ____you look after it carefully，this coat will keep you warm through many winters. A: If B: Unless C: Before D: So
- Please ______ before you cross the road. A: look up B: look around C: look at
- You should be more( ), you must write . A: careful; carefully B: carefully; careful C: careful; careful D: carefully; carefully
- ---Must we clean the classroom before class?---No, you ___ (not). They will do it after class.