Hello! Is Mr. John in the office—Yes. But I’m sorry. He is busy _____ and can’t speak to you.

We live day by day, but in the great things, the time of days and weeks____ so small that a dayis unimportant.[ ]

Once out of the earth’s gravity, the astronaut is________ by the problem of weightlessness.

It remains to be seen ________ the newly formed committee’s policy can be put into practice.

Can you tell me ______ it isfrom here to the Summer Palace —Let me see. It’s about 15 minutes’ ride.