Monthly mood swings are not just women’s business: the latest research shows that the boys are also prone to the monthly blues. A study by psychologists from England’s University of Derby suggests that men may experience cyclical symptoms similar to, or _____37_____ , those suffered by pre-menstrual women. Symptoms of this “periodic male tension” or PMT _____38_____ pain, loss of concentration, behavioral changes, physical reactions, negative feelings and loss of arousal. The research team asked 100 men and women about symptoms usually related to the menstrual cycle. They were stunned _____39_____ the men reported they suffered from similar symptoms more severely than the women. Previous studies suggest the male symptoms could be caused by internal biorhythms: the theory is that we all experience cyclical changes in our moods but, _____40_____ , women also menstruate cyclically. Another hypothesis is that men have a lower pain threshold than women and are making a fuss about nothing.
【題組】40、 (A) coincidentally (B) interchangeably (C) unforgivably (D) willingly