Single-parent usually____ some of the functions that absent adult in the house would have served under the financial crisis.
—I’m going to Thailand this summer holiday.—
She always come to our help when we get into trouble ____ she is very busy.
He has three brothers, ________is a doctor.
As teenagers of the 21st century, we should be ready to _____ the challenge of society.
The reason _____ they held a party was _____ it was Sue’s birthday.