单选题 What can couples do to keep their ...... to each other instead of seeing it decline over the years?

单选题 "What in the world have you done?" ...... my high school classmate, when he saw me gaining a lot of weight one year after graduation.

单选题 I love swimming because it gives me a sense of ...... calm from inside out.

单选题 Would you like that picture? Don't ...... to say no if you'd rather not.

单选题 Encryption should be used when a secret message is ...... online.

单选题 A recent study shows that traffic pollution in cities is becoming a ...... to health.

单选题 The local hospital has ...... a campaign to raise money for new medical equipment.

单选题 Today's assignment is to go to the library and ...... more about what happened to Jews during World War II

单选题 Anyone who wants to complain about unfair treatment must ...... a written report to the committee.