—I'm sorry, but I don't quite follow you. Did you say you wanted to return on September 20?—Sorry, I __________ myself clear. We want to return on October 20.
The police always take ________ of dogs’ sharp sense of smell to search for the survivors in the earthquake.
— I’m sorry to have hurt you. — Forget it. You didn’t mean ________, did you?
My life has been _____ with many milestones and accomplishments of which I am proud.
Although some unexpected difficulties have ________ in the process, we are confident that we can handle them.
As we all know, the problems of environmental pollution facing us today are far from ____.