With masses of homework _____, I can hardly spare time to practice playing the piano.[ ]

In the vibrant coastal resorts ______ international restaurants that provide you with a variety of exotic food and high-quality modern hotels.

The kids were hard to ______ since they were so excited in the evening party.

You must have missed the last train to Guangzhou the other day.- Oh, no, I _____.

known to all that the US is about the same size as China, whereas its population is five times________.