1．关键句型练习答案
A 1 Dan Robinson has been worried all the week.2 Dan was asked to call at the local police station.
3 Dan wondered why he was wanted by the police.
4 Dan was told at the station that his bicycle had been found.
5 Dan's bicycle was picked up in a small village four hundred miles away.
6 The bicycle is being sent to Dan's home.
7 Dan was surprised and amused when he heard the news.
8 Dan was amused because he never expected the bicycle tobe found.
9 The bicycle was stolen twenty years ago.
2．难点练习答案
1 on 2 off 3 out 4 at
3．多项选择题答案
1 d 2 a 3 b 4 c 5 a 6 d
7 c 8 b 9 c 10 b 11 c 12 a