хелп плиз
1. Underline the correct form.
a. While he 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
laboratory, he dropped / was dropping a glass bottle which had same plastic inside -
and invented / was inventing safety glass.
c. Columbus arrived / was arriving in America while he tried / was trying to reach
the Far East.
d. AIexander FIeming discovered / was discovering penicillin by accident while he
looked / was looking at some old experiments.
e. While Hiram Bingham climbed / was climbing in the mountains of Peru in 1911, he
discovered / was discovering the lost city of Macchu Picchu.
f .While Isaac Newton sat / was sitting under an apple tree, an apple fell / was falling
on his head, and he understood / was understanding gravity.
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g. While Dr Harry Coover tried / was trying to invent a new kind of pIastic, he made
/ was making a very soft substance which stuck / was sticking things together. It was
Superglue.
h. While he observed / was observing the Moon through his teIescope, Galileo
realized / was realizing that it had mountains and craters.

2. Use the prompts to make a question. The answers are in Exercise 1.
a. Where / Edouard Benedictus / work when he invented safety glass?
Where was Edouard Benedictus working when he invented safety glass?
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 / look at / through his telescope? _______________________ ?

1.a) was taking bath, Archimedes discovered.b) was working, dropped, inventedc) arrived, was trying.d) discovered, was looking.e) was climbing, discoveredf) was sitting, fell, understood.g) was trying, was making, stuck.h) was observing, realized.2.b) Where was Columbus trying to go when he reached America?c) Where was IN sitting .....?d) What did Dr Harry Coover hope to invent?e) What was Galileo looking at through his ....?