1) They ... (never/see) the Eiffel Tower before.
have never seen
2) We ... (plan) for my sister's wedding for months! Now the day is here!
have been planning
3) He ... (always/talk) about his life and what's he doing but he doesn't care about anyone else!
is always talking
4) I ... (prepare) for my maths test tonight so don't call me then.
am preparing
5) How long ... (they/argue) ?
have they been arguing
6) She ... (think) about changing her job because she isn't happy about it.
is thinking
7) I ... (know) this song since I was a child.
have known
9) Listen! Somebody ... (whistle) this horrible song in the street again!.
is whistling
10) She ... (teach) Physics for more than fifteen years.
has been teaching / has taught
11) More and more people ... (recycle) their rubbish.
are recycling
12) The teacher ... (give) us really difficult tests this year.
has been giving
13) She ... (go) to the bank to pay some bills. She'll be back in an hour.
has gone
14) Ralph ... (get) frustrated because the meal he ordered .. (not/be/served) yet.
is getting / hasn't been served
15) The baby......(sleep) for 2 hours
has been sleeping
16) Where have you been? Your mother ... (call) you all day!
has been calling
