单选题 --How are their talks going on? Have they reached any agreement?
--They only seemed to have agreed to set another date for ______ talks.
A. deeper B. slower C. further D. higher

【正确答案】 C

【答案解析】本题考查几个形容词比较级的意思。A更深的，更深刻的；B更慢的；C更进一步的，更深层次的；D更高的。只有C符合题意。