1.  A case has to be made, therefore, for seasonally adjusting the monthly figures and for excluding school-leavers.

2.  A control group had to be examined as well as the group that we are studying.

3.  A couple of scenes had to be cut because they were too violent.

4.  A couple of the scenes had to be cut because they were too violent.

5.  A final factor has to do with the position of the litter tray.

6.  A good objective has to identify a target in very precise terms.

7.  A key principle here has to be reciprocity.

8.  A literature search has to be made by the learner, who then makes an assessment of the particular problem.

9.  A lot of companies had to bite the bullet and lay off a lot of their employees.

10.  A major speech had to be delivered.