1.The used plastic bottles were washed with water

2.when did you see tom?

3.If you don't work harder you will fail the exam

4.I suggest going out  for a change.

5. How about making posters on energy saving and hanging them around our school ?

6.Because she is a newcomer, she may need some help

7.My father hasn't smoked since last year

8.i didn't see her a long time ago

9.There are one thousand students in my school

Đáp án + Giải thích các bước giải:

1) The used plastic bottles were washed with water.

2) when did you see tom?

3) If you don't work harder you will fail the exam.

4) I suggest going out  for a change.

5) How about making posters on energy saving and hanging them around our s)hool?

6) Because she is a newcomer, she may need some help.

7) My father hasn't smoked since last year.

8) I didn't see her a long time ago.

9) There are one thousand students in my school.