Some scientists have sent a spacecraft to Mars. It ____ several months to get there.
| A．spent | B．has spent |
| C．has taken | D．take |
Let me _________ it.
| A．does | B．to do | C．doing | D．do |
I’m thirsty. I want to buy something _________.
| A．to drink | B．drink | C．drinking | D．for drink |
Hurry up, _______ you can’t catch the first train.
| A．and | B．but | C．or | D．so |
Every day we should keep our classroom _________ .
| A．cleaning | B．to clean | C．clean | D．cleans |
Alice is famous ________ her paintings.
| A．for | B．of | C．as | D．to |