问题
选择题
Yang Liwei’s journey into ____ space took him 600,000 kilometres in ____ orbit, around the earth 14 times, in just over 21 hours.
A.a, an
B.the, an
C.不填,不填
D.the, the
答案
答案:C
考查冠词的用法。句意“杨利伟在太空遨游了600000公里,用时21小时,绕地球14圈。”space前不加冠词,in orbit“在轨道上”。故选C。