People must_____ down too many trees.

The rainy season is coming and let’smake full use of the _______ daysto dry whatever is needed to dry．

Stronger and more lasting memories are likely to be formed ________a person is relaxed．

A large amount of solar energy ________ electrical energy since amounts of advance equipment ________ introduced.

_____ to blame him for neglect ofduty The president of the company is his uncle.