1 Underline the correct form.
a Whilehe took/was taking a bath, Archimedes discovered/was discovering the principles of
density and buoyancy.
b When Edouard Benedictus, a French scientist, worked /was working in his Iaboratory, he
dropped /was droppinga glass bottle which had same pIastic inside - andinvented /was
inventing safety glass.
c Columbus arrived/was arrivingin America while hetried/was tryingto reach the Far East.
d AIexander FIemingdiscovered/was discovering penicillin by accident while helooked/was
looking at some old experiments.
e While Hiram Bingham climbed /was climbing in the mountains of Peru in 1911, hediscovered
/ was discovering the Iost city of Macchu Picchu.
f While Isaac Newton sat/was sitting under an appIe tree, an appIe(ell/was (alling on his
head, and heunderstood /was understanding gravity.
g While Dr Harry Coover tried
/ was tryingto invent a new
kin d of pIastic, hemade
/ was making a very soft
substance which stuck /was
sticking things together. It was
SupergIue.
h While heobserved /was
observing the Moon through
his teIescope, Galileorealized
/ was realizing that it had
mountains and craters. Maeehu Picehu2A Use the prompts to make a question. The answers
are in Exercise1.
a Where / Edouard Benedictus / work when he
invented safety glass?
....lNh&r&.w,:;:{s ..~JQu,:;:{rJ.J;3&I'l.&diclus ...wQrtil'l.q.
...wh.&I'l. h.&..iI'l.V&l'l.l&d ..s,:;:{:f&l?j ..q(,:;:{SS.....?
b Where / Columbus / try to go when he reached
America?
?
c Where / Isaac Newton / sit according to the
story about gravity??
d What / Dr Harry Coover I'hope to invent??
e What Galileo / Iook at / through his teIescope??28 Complete the sentence with the past continuous
form of the verb in brackets. The sentences refer to
Exercise1.f Edouard Benedictus (not try) ..to invent safety glass.
g AIexander Fleming (not hope) ..to discover penicillin.
h Hiram Bingham (not Iook for) ..the Iost city of Macchu Picchu.
Isaac Newton (not sit) ..in his study when he understood gravity.
Dr Harry Coover (not conduct) ..an experiment to discover a kind of glue.o
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