Not a single word_______when _______about his late mother.

The engineer are so busy that they have zero time for outdoor sports activities, ____ theyhave the interest.[ ]

There are three bananas. Please____ .

Not only ______ to look after her children, but also _____ to work.

n problems such as energy crisis, pollution and populationexplosion_________, people are asked to share the bitterness and endure thehardship with all the whole nation of the times．