A person’s life is like a road lots of difficulties.—So we need positive energy.

We can’t go out for a walk __ a rainy day.

nager of the sales department is keptbusy all day. After he has solved one problem, another is sure to _______.

下列各句表达最得体的一项是（　　）

Volunteers are making use of every minute to________ their foreign languages because language volunteers must pass a written test and an interview.