【推荐1】The great pianist performed in the centre of the stage，at_______ command the keys were producing wonderful tunes（曲调）. （用适当的词填空）

【推荐2】Last month, part of Northwest Jiangsu was struck by earthquake, from _______effects people are still suffering. （用适当的词填空）

【推荐3】完成句子（每空只填一次词）
1. I will always remember the days _____ I spent in the beautiful city with my husband.
2. He was generous with his time, ______ ______ I was grateful.
3. That ______ the fourth time ______ Mr. Smith has visited the Summer Palace.
4. The places outside the towns ______ they were sent to live were the poorest parts of South Africa.
5. It was at the age of 65 ______ he left his hometown for Taiwan.