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题目内容
（聊城大学-大学英语四(专升本)）
(单选题) I had some trouble __________ the letter. His handwriting is very bad.(本题3.0分)
A、 on reading
B、 reading
C、 to read
D、 read
A、 on reading
B、 reading
C、 to read
D、 read
参考答案