Question

Small island
(1) Have you ever heard / Did you hear of
Tuvalu? It's a Polynesian island in the Pacific
Ocean. There are two official languages,
Tuvaluan and English. Only 12,373 people
(2) live / are living there. The population is not
as small as in Vatican City or Nauru, but it (3)
is / has been the third smallest in the world.
Tuvalu is about halfway between Australia
and Hawaii.
The country is in fact nine tiny separate islands.
Four (4) are / will be reef islands and five are
atolls, coral islands with a lagoon in the middle.
Europeans (5) have known / knew about the
islands (6) for / since over 400 years. A group
of Spanish explorers saw the islands in 1568,
but (7) weren't able / haven't been able to land.
In fact, Europeans didn't land on Tuvalu until the
late 18th century. The islands (8) became / have
become part of the British Empire in 1892.
They were called the Ellice Islands.
Tuvalu (9) was / has been an independent
country (10) since / for 1978, but Queen
Elizabeth II of Great Britain is the head of state.
It (11) became / has become a member of the
United Nations in 2000. There is a campaign
in Tuvalu about environmental problems. If the
level of the sea (12) rises / will rise, Tuvalu will
disappear!
Tuvalu is a very poor country. A lot of Tuvaluans
work as fishermen, farmers or government
employees, but the country needs a lot of
foreign money and help to survive.​

Answer 1

(1) have you ever heard of
(2) live there
(3) has been
(4) are
(5) have known (cred)
(6) for
(7) weren't able
(8) have become
(9) has been
(10) since
(11) became
(12) rises