根据句子的意思和所提供的汉语，补充句子，使句子通顺完整。
他日夜工作以还清债务。
He worked                             to pay off the debt.
我急切盼望你的回信。
I’ m                              your reply.
他考试作弊，怎么没受到惩罚呢？
How did he                          cheating in the exams?
Don’t bother to look for my umbrella; it will ________ ________some day. (出现)
The race was so close that everyone was ________ ________ ________ at the finish. (屏住呼吸)
He couldn’t ________ ________ his foolish mistake. (作出解释)
经济危机首先在美国爆发。
The economic crisis ________ ________ first in the United States.
I must ________ ________ this morning and do the cleaning. (安下心来)