Life in the oceans ranges from the tiniest plankton ______ up to giants like sharks and whales.[ ]

It seems that living green is _______ easy and affordable. A small step makes a big difference.

I’d appreciate _____if you could turn the radio down. I’m doing my homework. [ ]

I’m afraid I don’t have the ability to make a speech in public. I’m too nervous. —Don’t worry. You will overcome it _______if you practice more.

Tina used to __________a round face.