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UNDERLINE THE CORRECT FORM
A) While he [took/was taking] a bath, Archimides [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 some plastic inside-and [invented/was inventing] safety glass
C) Colombus [arrived/was arriving] in America while he [tried/was trying] to reach the Far East.
D) Alexander Fleming [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.
G) While Dr. Harry Coover [tried/was trying] to invent a new type of plastic, he [made/was making] a very soft substance which [stuck/was sticking] things together. It [was/was being] superglue.
Respuestas
Respuesta:
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Respuesta:
UNDERLINE THE CORRECT FORM
A) While he [ was taking] a bath, Archimides [discovered] the principles of density and buoyancy.
B) When Edouard Benedictus, a French scientist, [was working] in his laboratory, he [dropped] a glass bottle which had some plastic inside-and [invented] safety glass
C) Colombus [arrived] in America while he [tried ] to reach the Far East.
D) Alexander Fleming [discovered ] penicillin by accident while he [looked] at some old experiments.
E) While Hiram Bingham [ was climbing] in the mountains of Peru in 1911, he [discovered] the lost city of Macchu Picchu.
F) While Isaac Newton [was sitting] under an apple tree, an apple [fell] on his head, and he [understood] gravity
G) While Dr. Harry Coover [was trying] to invent a new type of plastic, he [made] a very soft substance which [was sticking] things together. It [was] superglue.