1、He has become a millionaire and owns a big computer company. He is really _________ great success in _________ business.
A. a; 不填 B. the; the C. a; the D. 不填；不填
2、Stonehenge was built in about 1800 B.C. It was probably used as _________ giant calculating machine to work out ________ position of sunrise and sunset at different times of the year.
A. 不填; a B. a; a C. the; the D. a; the
