1£®The police still have not found the lost child£¬but they are doing all they can.

2£®Our daughter could walk when she was nine months old.

3£®Accidents can happen on such rainy days.

4£®We may go to the cinema tonight£¬but we are not sure yet.

5£®That might be our taxi but I doubt it.

6£®I could do it now£¬if you like.

7£®Must I give up smoking?

8£®Did she have to pay a fine?