Macmillan English Grammar

The future of our solar system

1'he Sunac (continue). .will.c,Ql:1li1144 much as it is today until it b (enter)~-"""'V

red giant phase in 4 to 5 billlon years. Then, the)eore (grow) ~.,.,"... m.smaller and

hatter until it finallyd(finish) ". "" _. " _ buming the fuel in its nuclear core. When this

e(oeem) ... the eoref(beeome) 50 dense that helium fusion will

begin. When the helium atoms g (eoUide) ... , they h (form) ..

earbon (from 3 helium atoms) and oxygen (from 4 helium atoms). When this proeessi(begin) ..

the Sunj(produee) enormous amounts of energy The Sun1<(gro w) ..

larger as this energy 1 (inerease) It m (be) .... over a hundred

times its present size by the time it n (stop) growing. This is why we use the term red

gianr. As the Suno(expand) ..........., it is probable that it p (absorb) ....

the Earth. When the Sun q (use) up all its energy, it r (beeome).

a small white dwarf, and s (not make) ... any mare energy After a few billion years, when

it is eompletely cool, itt(be) .... just a eold dark objeer.

7 Choose the correct form, A, B or C, to complete the sentence.

OJ

E

Look at the explanation

page and read the section

future time c1auses

following time words.

Write seven sentences

about yourself, using the

time words in the list on

the explanation page.

Make a diary for next week,

to rem ind you what you are

doing on each day.

Then write a sentence for

each day.

Need more practice?Goto

theReviewon page 792.

EXTENSION ACTIVITY

1

a We seem to be completely lost. WhatA naw?

b Just think, this time next week we ... taking a taxi to the airport.

c As soon as we he ar any news, we you know.

d The new film ofHamlet starring Johnny Depp ... next week.

e Same scientists believe that they a wre for most types of cancer by 2050.

f.... a press conference about aur new discovery on Tuesday.

g Look at that helicopter! It ... on the sports field!

h In a year's time I...... ...in the music industry.

Hold on to the camera. .. .....drop it.

We a new area in the Zoo where visitors will be able

to get closer to the animals.

a are we doingwill we doAare we going to doBC

b

takewill be takingAare going to take BC

c

will have letwillletAare letting BC

d

Awill have come out BCcomes outwill come out 2
e

Adiscover BCare discoveringwill have discovered

f

AWe'/l have held BCWe holdWe/re holding

g

Awill land BCislandsgoing to land

h

Aam going to work Bam workingCwill be working

AYou drop

BCYou/re going to dropYou//l be dropping it

Aopen

BCwill have openedare going to open