33．— We should recycle everything we can．— Absolutely．These may seem little things，but they’re not__________it comes to saving the environment

The growing speed of a plant is influenced by a number of factors, ____ are beyond our control.

Instead of sand ____everywhere, there is mud and water everywhere, _________it difficult travel from place to place.

If I have any further news, you will be the first person_____.

The meeting was _____ when the chairman fell ill.