問題詳情:
Grandpa is getting old and he has trouble ________ what others say to him.
A. hear B. to hear C. hearing D. heard
【回答】
C
知識點:非謂語動詞
題型:選擇題
問題詳情:
Grandpa is getting old and he has trouble ________ what others say to him.
A. hear B. to hear C. hearing D. heard
【回答】
C
知識點:非謂語動詞
題型:選擇題