difficulty 困难, 艰难[U][(+in)]
I had no difficulty in getting in touch with him. 我和他取得联系没有什麼困难.
固定组合来的,difficulty in doing sth
所以要选D
difficulty 困难, 艰难[U][(+in)]
I had no difficulty in getting in touch with him. 我和他取得联系没有什麼困难.
固定组合来的,difficulty in doing sth
所以要选D