By the time we ___ , they had already left.
had been arriving
arrive
were arriving
arrived
I ____ New York several times.
have visited
was in
visit
been in
She _______ medicine for nearly a decade when she finally becomes a doctor
will be studying
has studied
would be studying
will have been studying
She _____ how to swim by next summer.
will be learning
has learnt
is learning
will have learnt
He _____ every morning since September in preparation for the marathon
gone running
has been running
is running
runs
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
played
were playing
have been playing
was playing
He_____ on the phone right now
is talking
talked
be talking
talks
They ____ their relatives next month
will visit
would visit
be visiting
were visiting
I _________ for hours when the bus finally arrived.
was waiting
be waiting
waited
had been waiting
