| A．at | B．in | C．with |
| A．a | B．an | C．some |
| A．lot of | B．a lot | C．lots of |
| A．good | B．hard | C．A and B |
| A．is | B．was | C．are |
| A．some mountains | B．a famous mountain | C．beautiful lakes |
| A．many mountains | B．a mountain | C．a beautiful lake |
| A．These | B．This | C．That |
| A．thousands | B．thousand | C．hundreds |
| A．火车比公交车慢。 |
| B．火车比公交车快。 |
| C．火车和公交车都快。 |
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