Hardly had the employees ________ with their work when the rain stopped.

Last year, the advertising rate _____ by 20 percent．

Two explosions near the finish line of the Boston Marathon killed at least 3 people and injured more than 180 others, and currently FBI has figured out how it __________.

A man is being questioned in relation to the ________ murder last night.

—I am wondering if we could go boating on the weekend. —It　　　　a good idea.