--What are Mexicans supposed to do when they meet ______ the first time?
--They are supposed to shake hands.
| A．on | B．for | C．among | D．at |
She doesn’t know _____________ next.
| A．what can she do | B．how she can do | C．what to do | D．how to do |
I look forward to ___________ America next year with my family.
| A．visit | B．visiting |
| C．visits | D．visitor |
_________ the afternoon of next Friday, we _________ to plant trees in the mountain.
| A．On, go | B．In, will go |
| C．On, will go | D．At, are going |
I can’t go to your party, because I have __________ homework to do today.
| A．too much | B．much too |
| C．too many | D．many too |
Mike’s mom is ill. He is ___________ her at home.
| A．looking for | B．looked after |
| C．looking after | D．looked at |