People in Britain always work from 9 a.m. to 5 p.m. so most offices are open 9 - 5. Schools usually start at 9 o'clock, too, but they usually end at about 3.30 p.m. Shops are usually open from 9 to 5.30 from Monday to Saturday and some shops are often open from 10 a.m to 4 p.m on Sunday.
a) How offen do people in Britain work?

`->` People in Britain always work from 9 a.m. to 5 p.m.
b) How offen do schools start?

`->`  Schools usually start at 9 o'clock.
c) How often are shops open?

`->`  Shops are usually open from 9 to 5.30 from Monday to Saturday and some shops are often open from 10 a.m to 4 p.m on Sunday.

a. People in Britain always work from 9 a.m to 5 p.m.

⇒Người dân ở Anh luôn làm việc từ 9 giờ sáng đến 5 giờ chiều.

b. School usually starts at 9 o'clock.

⇒Trường học thường bắt đầu lúc 9 giờ.

c. Shops are usually open from 9 to 5.30 from Monday to Saturday and some shops are often open from 10 a.m to 4 p.m on Sunday.

⇒Các cửa hàng thường mở cửa từ 9 giờ đến 5 giờ 30 từ thứ Hai đến thứ Bảy và một số cửa hàng thường mở cửa từ 10 giờ sáng đến 4 giờ chiều vào Chủ nhật.