.The problem, according to the experts, is ________ we should do with the salty land.
When he was alive, the old scientist used to say that knowledge ____from practice and he gained his experience by doing a lot of practical work.
She _____ to the office than she got down to writing the report.
He ___articles for our wall-newspaper these three years, and he ___about forty articles.
—— Look at the black clouds.It ______ soon. —— Sure.If only we _____out.
The children ______ very quiet; I wonder what they ____up to.