—This math exercise is ________ difficult ________ I can’t work it out.
—Come on! Use your head and you will find a way.
such; that
so; which
so; that
This blue pen is .
—Is this dictionary? —No, it isn’t. It’s .
This is map and that is orange.
__________ my notebooks. They are new(新的).
Please call Jack _____ 021-7665-4578.