Question

Choose the correct answers:
WWF is one of the most famous environmental
organizations in the world. It has existed (1) since/for 1961 when a group of scientists, naturalists,
businessmen and political leaders (2) started / have
started the organization. The first office (3) was /
has been in Switzerland. Over five million people
have (4) still / already joined and together they
(5) achieved / have achieved many things. It (6)
supports / is supporting about 1,300 conservation
and environmental projects around the world. In
fact. (7) for since 1985 WWF (8) was investing
I has invested over $1.165 billion in more than
11.000 projects in 130 countries.
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Answer 1

1since
2.have
3.has
4.already
5.have
6.supports
7.since
8.has invested