I think self﹣driving cars will come into our life________.
Perhaps.( )
A.in a few yearsB.a few years ago
C.for a few yearsD.after a few years
Please tell me_____you have learnt English.
For three years.( )
how long
how often
how soon
He felt tired, so he stopped______a rest under the tree.( )
having
have
to have
Get up early,_____ you will miss your train.( )
or
and
but
I _____ a math problem with Joe when Mike called me up.( )
have discussed
discussed
was discussing
The nurse _____ is looking after the old man is Tom's sister.( )
which
who
what