When the ship lost its engine power,the crew found themselves at the_________of the wind.

Theyknewtheyhadto________actiontodealwiththeplaguebeforeitspreadtootherareas.

We knew the boss________be angry if we didn ’t finish the work in time.

If you have difficulty locating a particular book ，please ask our librarians for___(assist).

Itisessentialthatyou__________anydocumentcarefullybeforesigningit.