Question

use the present simple tense to complete the senteces below
a-1903: edward binney life __________(co-invert) crayons

b-1921 : artificial life _________(begin)-the first robot built

c- 1937 : chester F .carlson_______(invent) the photocopier .
d- 1945 :vannevar bush ____________(propose) hypertext

Answer 1

a) co-inverts
b) begins
c) invents
d) proposes