---Why does Tommy look unhappy ? --- Bec
题型:选择题
问题:
---Why does Tommy look unhappy ?
--- Because his teacher makes him _______ the classroom all by himself .
A.to clean
B.clean
C.cleans
D.cleaning
---Why does Tommy look unhappy ?
--- Because his teacher makes him _______ the classroom all by himself .
A.to clean
B.clean
C.cleans
D.cleaning