When____to danger and conflict, men tend to increase blood pressure, ___nervous or anxious.
I must go now. _____, if you want that book I'll bring it next time.
A completely new situation is likely to _____ when the school leaving age is raised to 16.
The illness from which Mary is suffering has now been _____ as hepatitis (肝炎).
These continual _____ in temperature make it impossible to decide what to wear.
All foreign visitors are requested to _____ with the regulations in this area.