So difficult ________ it to work out the problem that I decided to ask my teacher for advice.
It remains a(n) question whether middle school children should be allowed to use mobile phones at school.
--- I’m as busy as a bee these days. --- To be honest, I do not your job.
After days of discussion, his plan to be the best one.
Knowledge through children’s own practice is lasting and will benefit them all their lives.
Students in the school get along well with each other though they come from different social and cultural.