We should take care of the blind. It is immoral to_______ them.

You don’t seem to be quite yourself today, do you? —I’m suffering from a cold Nothing serious, ____

It is reported that a bus went out of ______control on a highway ______ south of the city last night.

Believe it or not, my sister and I are twins.— Oh, you must have had the case _________ you were taken for your sister.

There are few students in the park, _________?