11-класс

Complete the sentences using the present perfect continuous ,affirmative or negative,or the present perfect simple form when the continuous is not correct.

1 His dad and step-mom------------him.

a) have helped

b) has helped

c) had helped

2 He      ----------------------------------------mountain-climbing  since he was nine.

a)  had liked

b) has been liking

c) have been liking

3 He --------------------------the highest mountain  in Australia.

a) had climbed

b) has climbed

c) have climbed

 He ----------the highest mountain in Antarctica yet.

a) had not climbed 

b)  has not climbed

c)  didn't climb