Traveling by plane is the most comfortable , but it is also the _________ .
--- Would you like to go shopping with me? --- I’d love to, ____ I can’t. I have many things to do.
The trousers are too big for me. Please show me a smaller ________.
The teacher says we _____read ______ comic books.
Helen needs _____________ candles for her birthday.
Teaching is _________ interesting work.