Complete the email with the Past Simple or the Present Perfect tense of the verb in
brackets.

Hi there Mom and Dad!
I (not/be) sure about the Summer Camp when I first heard about it, but I 2)
have) the most amazing time since I got here! And to think that it wasn't so long ago that I
3) (pack) my bags and 4)
(kiss) you goodbye! Two weeks down and three to ge!
Every day we have new guest speakers and the talks 5) (be) fascinating so far, at least until
yesterday when Peter 6)
(have) to cancel because of a cancelled flight.
Our camp leaders then 7)
(decide) to
bring us to the laboratory, and we 8)
(make)
eggshell geode crystals instead. Well, you know that
I 9)
(do) a lot of different experiments in
my life, but this one 10)
(be) truly cool, and
unlike my chemistry experiments gone wrong, nothing
11)
(explode).
The world of science sure 12)
(change) a
lot in the last few years! 13)
(you/hear) about
the discovery of water on Mars? Last August the Mars
Orbiter 14
(use) an imaging spectrometer
and 15)
(detect) presence of hydrated minerals.
This confirmed what NASA 16)
(suspect)! We
17)
(learn) so much about our Solar System
since we first 18)
(land) on the Moon and these
are things that 19)
(seem) impossible to study
just one hundred years back!
This 20)
(be) such an amazing opportunity
and I love every minute.