[ Vocabulary & Grammar ]
The meal was served while the children ________ the in-flight film.
A. ve been watching
B. were watching
C. d been watching

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Gerunds and Infinitives › ViewThe doctor agree______some medicine to the boy.
A. to give
B. giving
Grammar › View
She spoke too fast………….
A. to understand
B. to understanding
C. understand
D. understands