My brother and I have decided to take great bike trip to Tibetan and I’m busy planning our

问题补充：

My brother and I have decided to take great bike trip to Tibetan and I’m busy planning our schedule for trip.

A. a; the

B. a; /

C. the; the

D. the; /

答案：

(答案→)A. a; the

B. a; /

C. the; the

D. the; /

解析：第一个空，表示“ 泛指”故用不定冠词a;表示上文提到过的人或事物，用定冠词the。