<span>1) Global warming is called (to call) the
greenhouse effect because the gases above the earth make the planet
comparable to a greenhouse.
2) The term «acid rain» refers to what
scientists call «acid deposition». It_______(is caused) by destructive
airborne acidic pollutants.
3) Acid rain________(was discovered) in 1852, when the English chemist Robert Agnus invented the term.
4) Recently, a more intensive research on the true causes of acid
rain________(has been done) so that countries have the information they need to
prevent acid rain and its dangerous effects.
5) Air pollution can__________(be found) both outdoors and indoors.
6) Every year, 14 billion pounds of sewage, sludge, and garbage__________(is dumped) into the world’s oceans.</span>
1. Make new friends.
2. Call this number
3. Join our club
4. Visit our website
5. Do gymnastic and get fit.
6. Talk about your favourite hobby.
1had been waiting
2 was taking
3 had read
4 had been lying
5 contains
6 am waiting
7 has Professor D.delivering
8 finds
9 will rain
10 am coming
11 to have been disturbed
12 to do
13 by
14 about
15 on
10 b
11 a
12 b
13 c
14 b
15 c
16 b
17 c
18 c
London is the beautiful country.There are a lot of landmarks in it.For example:the London Eye of famous Big Ben.In London there are a lot of famous shops,where I can buy many beautiful clothes.London is beautiful and famous contry,and all people which arrived there were in wonderful impression.