In class, fewer of the students who are not ___ their studies sometimes ____the dying robots, not listening attentively.
—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.