If Aan astronomer looks at Bstar that is Cone hundred light years away, Dthe lig

游客2024-01-02  7

问题 If Aan astronomer looks at Bstar that is Cone hundred light years away, Dthe light that can be seen is one hundred years old.

选项 A、 
B、 
C、 
D、 

答案 B

解析 Star is an indefinite singular countable noun that needs an article. Correction: a star.
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