单选题 He is emotionally _______ since his girlfriend left him.

单选题 He has suffered a(n) _______ heart attack--- nothing too serious.

单选题 It is an almost _______ truth that the more we are promoted in a job, the less we exercise the skills we initially used to perform it.

单选题 Stop _______ your sleeves like that! They can become too long very quickly.

单选题 It is not uncommon for a nurse to _______ a different approach to the doctor if the present one is ineffective.

单选题 Cold _______ such as stuffy nose, runny nose and scratchy throat typically develop gradually, and adults and teens often do not get a fever.

单选题 I want to major in biology because I have long been wondering about the _______ of life.

单选题 She did volunteer work in _______ homes after graduation as a biology major and it was very satisfying.