Ex4: Find and correct the mistake
1. We didn’t used to have a colorful TV, but we do now.
A. didn’t B. used to C. have. D. do
2. When my baby sister is younger, she didn’t use to eat pizza.
A. younger B.didn’t use to. C.eat
3. It’s about 500 meters at my house to school.
A. It’s about B. meters C.at. D.to