21.   Whether they are made implicitly or explicitly, the problem still remains of clarifying their meaning.

22.   Yet even with this verdict, moral problems still remain.

23.   Yet, although attitudes changed, the central problem remained.

24.   The wider problem remains.

25.   One last problem remains, but is probably unanswerable.

26.   The problem of rebleeding remains, however, except in patients treated with shunt surgery.

27.   But some problems remain unresolved or unaddressed.

28.   Moreover, the fundamental problem remains that of the housing shortage.

29.   Zeneca will have little problem in paying its whack, but for the residual ICI businesses problems clearly remain.

30.   If problems do remain after two or three months, ask your doctor about changing to a different type of progestogen.