The fact has worried the people across the world ___________ the earth is becoming warmer and warmer these years.

_____ is your office away from here?—Just ten minutes’walk. [ ]

The more _____ you listen to the tape, the _____you’ll find it to understand. —I agree with you.[ ]

What do you want to do for vacation?—I ____ my aunt.

_________ we go at 7.30 ? －What about __________ it a little earlier ?