Every morning he spends ____ hour doing exercise, then he goes to ____ work.( )
an; \
a; a
a; \
There is plenty of information about AI(人工智能)on the website,___________?( )
isn't there
isn't it
is there
My aunt became a nurse in her _______and she still loves her job now.( )
twenties
twentieth
twenty
The teacher with curly hair teaches us _____________ the guitar.( )
to play
play
playing
Big sale!We have T﹣shirts __________white __________only $6.( )
in;for
of;for
in;at
She can't sleep well __________too much noise next door.( )
because
because of
since