______, we use smartphones for almost everything.
nowadays
We visited Paris two years ______.
ago
In the 19th ______, many people migrated to America.
century
She studied hard ______ the entire exam period.
during
It's been a ______ since we last met.
long time
______, many people work from home.
nowadays
I will wait here ______ you return.
until
It has been a ______ since I visited my hometown.
long time
______ days, people are more conscious about their health.
these
______ summer, they go on a family vacation.
each
You can stay here ______ 5 PM.
until
______ days, the weather has been unpredictable.
these
He left the office a few minutes ______.
ago
She goes jogging ______ morning.
each
We stayed indoors ______ the storm.
during
I have been waiting ______ an hour for the bus.
for