By the time we ___ , they had already left.
arrive
arrived
were arriving
had been arriving
I ____ New York several times.
was in
visit
have visited
been in
She _______ medicine for nearly a decade when she finally becomes a doctor
will have been studying
will be studying
has studied
would be studying
She _____ how to swim by next summer.
will have learnt
has learnt
will be learning
is learning
He _____ every morning since September in preparation for the marathon
runs
is running
gone running
has been running
She _______ such a beautiful sunset before in her life
not been seeing
had never seen
not saw
's not seen
They_________ soccer when it started raining
have been playing
were playing
was playing
played
He_____ on the phone right now
talks
is talking
talked
be talking
They ____ their relatives next month
be visiting
will visit
would visit
were visiting
I _________ for hours when the bus finally arrived.
was waiting
had been waiting
waited
be waiting
