[ Present Perfect vs Past Simple Tense ]
They ___ at the tennis court two hours ago.
A. was
B. were
C. has
D. have
E. not mentioned

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Vocabulary and Grammar › ViewBut the windows also go transparent on buildings … there is less sunlight.
A. which
B. where
C. who
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. In the future, people will have a robot _____ all the deliveries for them.
A. to do
B. doing
C. done
D. do
