Your brother ______you is very kind to me.
When their children lived far away from them,these old people felt ______from the world.( )
carried away
broken down
cut off
brought up
Scientists have advanced many theories about why human beings cry tears,none of ______ has been proved.( )
whom
which
what
that
To return to the problem of water pollution,I'd like you to look at a study _______ in Australia in 2012.( )
having conducted
to be conducted
conducting
conducted
Silk ______ one of the primary goods traded along the Silk Road by about 100BC.( )
had become
was becoming
has become
is becoming
We can achieve a lot when we learn to let our differences unite,rather than _______ us.( )
divide
reject
control
abandon