—Why didn't you chat with that friendly foreigner just now? — I'd like to, but the trouble was ________ he said was difficult for me to understand.
[ ]
A. what which B. that what C. that that D. what that
参考答案:
He found it increasingly difficult to read,__________his eye..
He found it increasingly difficult to read,__________his eyesight wasbeginning to fall.[ ]A. though B. for C. but D. so