With the development of science and technology,there is no doubt ________ Chinese astronauts will land on the moon in the near future.
. Mr. Smith sold that magnificent cottage of his on the sea 2,000,000 dollars.
___________lessons were not difficult.
—You don't seem to be quite yourself today. What's wrong? —Oh, I'm suffering from a cold. Nothing serious,
. The most favorite room is the tidy study with a fireplace, we can watch TV and enjoy the nice scenery outside.
I often have conversations with John over telephone, while keep in touch with Tom by__________ letter.