The Math problem is too difficult , we really don’t know ________ to do it .
| A．which | B．where | C．what | D．how |
There is a very big river _____ their school _____ the village.
| A．in, and | B．between, and |
| C．either, or | D．between, or |
It’s easy ________ chess.
| A．play | B．to play | C．playing | D．plays |
How long does it take you _____ to work?
| A．to get | B．get |
| C．for get | D．to getting |
_____ our group, Li Fei often goes to bed late _____ school nights.
| A．At, in | B．On, on | C．In, at | D．In, on |
—What time do you usually get _____?
—Well, _____ six thirty.
| A．dressed, at | B．dress, at |
| C．dressed, for | D．dressed, on |