I called you at eight o'clock last night,but nobody answered.
Oh,I________ a shower at that time.( )
am taking
took
is taking
was taking
Do you know that we have already made great progress in 5G?
Oh, ________exciting news!( )
how
what an
what
Tom. together with his friends, often________ to the old people's home to cheer the old up.( )
go
going
goes
Look at the sign "No swimming", it warns us ________ in the lake.( )
to swim
not to swim
swimming
In February, 2020, many doctors and nurses ________ to Wuhan to save the patients.( )
was sent
were sent
are sent
There ________ something wrong with my mobile phone. It can't work these days.( )
must be
can't be
may be