câu 1:if we don not protect the enviroment,we will destroy ourselvescâu 2:

câu 2:if she doesn't more hard-working,she will get low marks 

câu3:if he doesn't listen to his parent,he will fail.

câu4: they have moived for one hour

câu5:he hasn't cried  for ten years

câu6:he hasn't gone abroad before 

câu 7:she has driven for 1 mounth

câu 8:we have  eaten when started to it rain.

câu 9:nam is watch television

câu 10: i have nottalked to the foreigner

câu 11:no river is the longer than the nile river

câu 12:we might have probably visit japan in th future

câu 13:nga is favourite sport badminton

câu 14:my children are like studying english very much