From time to time a crocodile has snatchedsomeone _______ he or she is even aware that the crocodile is there

Sarah pretended to be cheerful, ____________ nothingabout the argument.

You are supposed to type quickly when talking with others on QQ.

All the books donated by the students from urban schools are said ________ to the students in the earthquake-stricken areas the other day.

A good storyteller must be able to hold his listeners’ curiosity ________ he reaches the end of the story.