Ответы:
A: 2
B :1
C: 3
D: 1
E :1
Вот образец - первые пять фраз.
Several times recently, I have shown you how to do this.
He has sung that song hundreds of times.
You sit on a sofa.
I had slept for two hours.
I have spoken in public on many occasions.
И так далее...
Have you ever been to Australia?
Have you ever lost your passport?
Have you ever flown in a helicopter?
Have you ever eaten Chinese food?
Have you ever been to New York?
Have you ever driven a bus?
Have you ever broken your leg?
1 - was walking
2 - weren't talking
3 - were looking
4 - was climbing
5 - wasn't wearing
6 - wasn't using
P.S. Как я поняла, нужно просто поставить глаголы в форму past continuous. Если же надо было выбрать, что поставить между другими временами, пишите в комментарии, исправлю.