• Viết lại câu có ý nghĩa không thay đổi:

• They often went to Da Lat in the summer.

• • They do not often went to Da Lat in the summer.

• • They did not use to go Da Lat in the summer.

• • They often goes to Da Lat in the summer.

• • They did not use Da Lat in the summer.

• Viết lại câu có ý nghĩa không thay đổi:

• Lan wrote to Trang twice a month.

• • Lan wrote to Trang twice a month.

• • Lan write to Trang twice a month.

• • Lan use to wrote to Trang twice a month.

• • Lan used to to Trang twice a month.

Viết lại câu có ý nghĩa không thay đổi:

Did they play football in the past?

• Did they football in the past?

• Do they play football in the past?

• Did they not play football in the past?

• Did they use to play football in the past?

• Viết lại câu có ý nghĩa không thay đổi:

• He was a doctor in that hospital.

• • He was not a doctor in that hospital.

• • He used to be a doctor in that hospital.

• • He were a doctor in that hospital.

• • He did not use to a doctor in that hospital.

chọn từ "must" hay "have to" điền vào chỗ trống:

I .......... buy some new clothes.My clothes look so old.

• must

• have to

chọn từ "must" hay "have to" điền vào chỗ trống:

I .......... buy some new clothes.I'm starting a new job as a teacher at school.

• have to

• must

chọn từ "must" hay "have to" điền vào chỗ trống:

I ......... finish this essay today.I'm going out tomorrow.

• have to

• must

I ........ finish this essay tonight because our teacher has told us to hand them in tomorrow.

• must

• have to

• When we were at school we ........... wear a uniform.

• must

• had to

You ....... tell her that you are sorry.

• must

• should