You have failed two tests. You’d better start working harder, ____ you won’t pass the course.
We all think that the plan you come up with ____________ the work is very practical.
They can find whatever they need in the supermarket, ______ is always busy on Sundays.
Beyond the lake _____ quantities of birds coming from the North every winter.
Referring to reading, we must have the patience to read ______ book so that we will have _______ deep understanding of it.
The weight of the moon is only about _____ of that of the earth.