If people change the wetlands to make space____ farms, the birds will not have enough space _____.
— When shall I hand in my report? — As soon as it ____________ tomorrow.
Some students don’t know how to ____________ stress and become worried.
They had much difficulty ____________ the problem and they needed our help.
You’d better go to bed early. Don’t ____________ too late.
He is very modest and he never ____________.