Chọn từ thích hợp
Bill : Hey Alex.
Alex : Hey Bill.
Bill : Are you busy (1) before / later?
Alex : Yes, sorry. I have to do my homework (2) after / in school?
Bill : What about (3) Saturday morning / yesterday morning?
Are you busy (4) then / next?
Alex : Let me see. No, I’m not doing anything (5) on / in the morning. Why?
Bill : Do you want to go mountain biking (6) on / in Saturday morning?
Alex : That sounds awesome.
Bill : Great! Where do you want to meet?
Alex : Let’s meet in / under the park across (8) from / in the school.
Bill : OK, great. See you (9) at /on Saturday.
Alex : See you (10) before / later.