The day before yesterday the police including one officer ____ searching for the murder in that mountain.
Although she brushed the old pot_______, she could not make it completely clean, which made her very upset.
Mr. Smith is always on time for everything. How ____ it be that he was late for the important meeting?
---Your grandfather still seems very energetic, although he is already in his seventies now.---Yes, he _______in the army for three years when he was young.
Many plants could move northward and toward the Pacific coast _______rising temperatures and changes in rainfall.
Once a schedule is made, by strictly _______ it, you can avoid putting off till tomorrow what should be done.