---We haven’t seen Tim these days. ---He _______ America.A has gone to B has been to C is going to D will go to
Why ________ come and play basketball with us?
—Your English is very good. —But my brother learns it much ______than I do.
Funny jokes can always make us _____ when we are sad.
-- ________ your teacher __________ ? -- She is friendly and helpful.
The Changjiang River is _________in the world.