23.
(A) I had just finished washing my car when it started raining.
(B) When I had finished in the bathroom, I noticed that the toilet tank was empty.
(C) After I locked the door, I had realized that my keys were inside the office.
(D) Professor Brown usually returned the students’ papers as soon as he had finished grading them.

答案：登入後查看
統計： A(8), B(15), C(81), D(50), E(0) #327177

詳解 (共 4 筆)

#830210
C and D 都不好~
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#440965
Professor Brown usually returned the students' papers as soon as he finished grading them.
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#867678
after 就已經表明是鎖門之後了，怎麼可能用had 過去完成式來接下一句
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#828791
官方答案給C,請阿摩修正 感恩
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