____ drone deliveries become a reality, there are many issues to resolve.
Until
After
Before
By the time
The professor discovered a cure for cancer ______ he was working at the university.
during
while
as soon as
as
She made a fortune ____ she sold her company to Microsoft.
during
as well as
while
when
The person _______ the speech is a well-known author.
given
has given
giving
having given
The librarian is the person _____ about this. She knows everything.
who to ask
for you asking
to ask
asked
The complaints _____ about Susan were totally justified.
to make
having been made
were made
made
Make it passive! Someone had stolen her idea before she could start the business. Her idea ______
Her idea had been stolen before she started the business.
You can watch the event ____ it happens on television.
during
although
as
before
Make it passive! An inventor has designed an amazing device to help blind people.
An amazing device has been invented to help blind people.
I moved around a lot during my childhood, so it was nice when my family decided to come back to London and put down ___
feet
roots
seeds
foundations
Nowadays, photos _____ with not just cameras, but with smartphones and tablets too.
can be taken
have been taken
will be taking
should have been taken
The way we take photos now is almost unrecognisable from how it ____ when cameras _____
was being done/ had been invented
had been done/ were being invented
was done/ were invented
has been done/ were invented
The Pacific island beaches feel so _____ that you can expect complete tranquility.
accessible
cramped
remote
obscure
Just a few kilometres away is the _____ town centre, with its many restaurants and nightlife.
fussy
bustling
deserted
restless
The station is ____ here. It should only take you about ten minutes to walk there.
adjacent from
halfway down
directly ahead of
not too far from
We hope that the African elephant doesn't ______ completely, despite the threat to their habitat.
fall out
die out
run out
disappear out
