viết lại câu sau sao cho nghĩa không đổi 

has everyone left the room ?

→ everyone.......................

what do you say in the situation you want your friend tidy the classroom

→ would you mind.............................................................................

i could not do the test because it was very hard

→ the test.............................................................

peter saved 10 dollar, so that he could go on holiday in the summer 

⇒ peter saved 10 dollar a month so

he prefers english to literature

→ he would rather....................

the nurse taught Nga how to give the first aid on the phone

→ Nga.....................................................................................