If the drought________in Southwest China, the crops will be ruined. Worse still, both people and animals will be threatened with a lack of drinking water.
I am told that her father is in London and ______ a dry-goods store.
He ______ English for six years by the time he takes his examination.
George has arrived, but I did not know he ______ until yesterday.
It ______ six years since they last saw each other.
Look at these clouds. ______.