A hundred years ago, people ___ use smartphones.
couldn't
can't
can
could
Today, he is older, so he ___ jump very high.
couldn't
could
can't
can
When she was a baby, she ___ run.
can
couldn't
can't
could
Today, we practiced a lot, so we ___ get 100% on the test!
couldn't
could
can
can't
Last week, she ___ find her pencil.
could
can't
couldn't
can
Now he is full, so he ___ eat anymore.
can
can't
couldn't
could
But today, he ___ speak English very well!
can't
couldn't
can
could
When she was a baby, she ___ only drink milk.
can't
can
could
couldn't
Two days ago, we ___ go outside because of the heavy rain.
could
couldn't
can
can't
In the past, she ___ ride a bike.
can
could
can't
couldn't
Now, everyone ___ use a phone to play games.
couldn't
can
can't
could
When he was a teenager, he ___ play basketball all day.
can
couldn't
could
can't
Now she is older, so she ___ swim very fast!
can
could
can't
couldn't
Last night, he ___ sleep because it was too noisy.
could
can't
couldn't
can
Yesterday, the students ___ understand the difficult math question.
can't
couldn't
can
could
Today, she ___ ride her bike to the park.
couldn't
can
could
can't
