(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
出自:聊城大学-大学英语四(专升本)

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块