A

1 Does she have to decide immediately? She doesn't have to decide immediately.

2 Must she decide immediately? She needn't decide immediately.

3 Do we have to take a taxi? We don't have to take a taxi.

4 Must we take a taxi? We needn't take a taxi.

B

1 I have to telephone him, too.

2 Mary has to wait for him, too.

3 Jim has to meet her, too.

4 Tom and Mary have to travel by ship, too.

C

1 Do you really have to telephone him?

2 Does Mary really have to wait for him?

3 Does Jim really have to meet her?

4 Do Tom and Mary really have to travel by ship?