Criticism and self-criticism _____ necessary _____ it helps us to correct mistakes.
I spent the whole day repairing the car.The work was easy.
Think hard and you won’t have the puzzle you.
This sentence is difficult to understand.Can you make of it?
—Is Paul playing basketball for his school?—Well,he ,But he has given it up and switched to playing volleyball.
You’d better go there by train.The train ticket is the airplane ticket.