Most disaster experts believe there is the potential ______ things could get a lot worse.
Two friends were talking about education, _______, about the kind of education that they received in their youth.
The temperature has risen to more than 20 degrees centigrade. It is quite hot _______January in Zhejiang.
--- Jack fell off the ladder yesterday, but he is all right now.---What a lucky dog! He _______ himself badly.
---Tell us, Mark, what is the cause of the American Civil War?---Well, is it _______the black slaves wanted freedom?
--- I can’t carry the luggage. It’s so heavy.--- Why not have someone strong enough_______ you a hand then?