nước mắt có tác dụng là rửa nhãn cầu và mí mắt, chống sự mất nước của niêm mạc nha bạn

Her father often plays tennis after work.

b

1: I started being a member of the English club in April.

2: The first time my sister began teaching English was 20 years ago.

3: It started raining half an hour ago.

4: They have been building this hotel for a year.

5: He had his breakfast at 7 o'clock

6: Mr.Ba began talking to our teacher an hour ago

7: The first time I started working here was August

8: I have been writing this report for a week

dễ thế này mà.

SHH: (99-1):1+1= 99 (SHH)
Tổng dãy số: (99+1) x99 :2 =4950
TBC: 4950 : 99= 50
=> Trung bình cộng của các STN từ 1 đến 99 là 50

10²

^{nhé bạn}

what kind of a question is this

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