This kind of stone _____ cool in summer and warm in winter.A. is being felt B. is felt C. feels D has been felt
People traveling long distances frequently have to decide ______they would prefer to go by land, sea or air.
It is ____ fashion differs from country to country ____ may reflect the cultural differences.
——What made him so upset? ——______she failed in her examination
He said______ his sister had passed the entrance examination of college, and______she would go to college in about 20 days.
Mr. Smith was so angry at all ______ Bill was doing ______ he left.