.Though the teacher had tried to make the problem easy__________, still Lily and her partner were at a loss.
Our teacher is always busy preparing lessons until 11 o’clock at night, we students have gone to sleep.
The news is spreading around the airport is a heavy storm is coming.
He is taller than he .
If you stand here, you’ll get a better of the river.
Let’s keep to the point, or we any decisions.