Read the conversation and fill in the gaps with appropriate prepositions of time. (Đọc đoạn hội thoại và điền vào chỗ trống bằng các giới từ chỉ thời gian thích hợp.)

Mark: I'm sorry I was out when you called yesterday afternoon, Alice. Look, I'm free (1) on the fifteenth of March. Can we meet then?

Alice: I'm busy next week, I'm afraid. So, I can't see you (2) on Friday.

Mark: I'd like to have a meeting this month if possible because I'll be very busy (3) in April.

Alice: I'm going away (4) at Easter, so how about the week after? Shall we meet (5) on the twenty-seventh? That's a Wednesday.

Mark: OK. Let's meet (6) on Wednesday afternoon (7) at half past two.