1.   Another problem will begin to raise its ugly head, in the form of parasites.

2.   Her medical problems began when she tripped on a rug and broke her hip.

3.   Many adults skin problems begin with childhood sunburn.

4.   My problems began some days later when I wanted to change the video mode.

5.   The problem began to expand to levels at once more profound and absurd.

6.   The problem begins when we realize that some companies are actually quite genuine.

7.   The problem is beginning to assume massive proportions.

8.   The problem then begins to stand clear and I shall now have to be brief and schematic.

9.   Then problems began to crop up.

10.   With more and more reactors coming on stream every year, it was inevitable that problems would begin to occur.