---- I must be off now. See you! ---- ________. See you!
The river ____are covered with trees is very long
----I missed the first part of the film. It was really a pity.----You _____home half an hour earlier.
It was at the very beginning____ Mr. Smith made a decision ___we should send for a doctor.
A brilliant idea occurred to him, ___ to his research in the lab.
He started early _______he could get there before nine