While I __________ the email, the computer suddenly went off.
was writing
When Carol __________last night, I __________my favorite show on television.
came/was watching
The plane ______ (take off)by the time I got to the airport.
had taken off
A new supermarket ________ next year.(build)
will have been built
A decision ________ until the next meeting.(make)
will be made
In more than 200 years the USA Constitution __________ 26 times.(change)
has been changed
Please meet me at the train station in ______hour from now.
an
Denver is located at the foot of __________ Rocky Mountains.
the
Toronto is located on __________ Lake Ontario.
no article
I need __________ bottle of water.
a
___ Penguins live in the South Pole.
no article
The Independence Day _____________ on the 1st of September every year.
is celebrated
The electric light bulb ______ by Edison.
was invented
I _____ to the doctor. I feel much better.
don't have to go/don't need to go
This is an opportunity that comes once in a lifetime. We _____ let it pass.
mustn't/ shouldn't
Your umbrella is wet. It _____ raining.
must be
