Along with his letter was his promise ______ he would attend the opening ceremony the coming month.
A. which B. that C. what D. whether
Along with his letter was his promise ______ he would attend the opening ceremony the coming month.
A. which B. that C. what D. whether
B
【解析】考查名词性从句。句意:他在信里承诺下个月将来参加开幕式。that引导同位语从句。