The book is for us to read.

See the flags on top of the building? That was _____we did this morning. [ ]

Most volunteers are from universities, _________ it is not uncommon to see middle and primary school students too

oner one _____ to the new workingconditions, the better it will be _______ his working efficiency

ter how much knowledge you have, if your subject is at all ______, be careful when discussing it during your speech, or you may well offend your audience.