giúp ----- Nội dung ảnh ----- Exercise 10: Fill in the blanks with correct preposition from the box.
1. I will leave at 6:30 because I have a karate lesson __________ 7 o'clock. 2. We have swimming lesson __________ 7:15 __________ 9:15 a.m., so we will go shopping after 9:15. 3. Are you free __________ Saturday morning? I want to invite you to go for a picnic with my family. 4. We were so busy yesterday, we had to work __________ 11 p.m. and slept in our office. 5. I have a roller-skating competition __________ Sunday morning. 6. What do you often do __________ the evening?
