Verified answer

a)

1 Have you been

2 has changed

3 was

b)

1 have visited

2 haven't been

3 did you go

4 had

c)

1 Did you see

2 were

3 did

d)

1 sent

2 Haven't you received

3 got

1 you have been to ..

2it changed...

3 I have been THERE.

B) 1 I visited...

2 I have never been...

3 have you gone

4 had a ...

C) 1 have you seen the....2were ..

3did

D) I sent ..2you haven't received yet?3 got...