The number of students in our school __________ about 30, 000 and __________ them study hard.
--- I can’t carry the luggage.It’s so heavy.--- Why not have someone strong enough_______ you a hand then?
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.