5.The last time Mary went to the stadium to watch football match was 3 years ago.

A.Mary has gone to the stadium to watch football match for 3 years.

B.Mary has not gone to the stadium to watch football match since 3 years.

C.Mary has not went to the stadium to watch football match for 3 years.

D.Mary has not gone to the stadium to watch football match for 3 years.

`=>` Có for + khoảng thời gian ( for 3 years)

`=>`S + have/ has + V3 + For + quãng thời gian

6.People in the mountainous regions use the basic tools to do the farming.

A.The basic tools are used by people to do the farming in the mountainous regions.

B.The basic tools are used by people in the mountainous regions to do the farming.

C.The basic tools are used to do the farming by people in mountainous regions.

D.The basic tools is used to do the farming by people in mountainous regions.

`=>` Bị động thì hiện tại đơn: S + am/is/are + P2 (+by O)

`=>` Các công cụ cơ bản được sử dụng bởi người dân làm nông nghiệp ở các vùng miền núi.

7.Mai drives more carefully than her mother `=` S + V + more + Adj/Adv + than

A.Mai's mother doesn't drive as carefully as her.

B.Mai's mother doesn't drive as careful as her. `=` S + V + as + (adj/ adv) + as 

C.Mai's mother doesn't drive as carefully than her.

D.Mai's mother drives as carefully as her.