__________ great fun it was to visit the World Expo in Shanghai last year!
–Could you tell me ______________? --- Nothing serious, just a little cold.
You’d better ______________ out, Jim. It’s raining hard.
We had no choices _____________ home, for the last bus went before we arrived.
The teacher showed us ______________ the problem.
-- It’s dangerous to walk across the street carelessly. --You’re right. We can’t be ________ careful while crossing the street.