下列大洲中,所包含的发达国家个数最多的是( )
Our English teacher wants us _______ English stories out of class.( )
read
reading
to read
I can't see Lucy because she is _______ the tree.( )
in front of
behind
next to
Mike lost his school ID card this morning.He is looking for _____ now.( )
it
him
them
I want to be ______ engineer when I grow up.( )
a
an
the
How long is BC in the triangle(三角形)ABC?( )
4cm
8cm
6cm