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。
小题1:他日夜工作以还清债务。
He worked to pay off the debt.
小题2:我急切盼望你的回信。
I’ m your reply.
小题3:他考试作弊，怎么没受到惩罚呢？
How did he cheating in the exams?
小题4:Don’t bother to look for my umbrella; it will ________ ________some day. (出现)
小题5:The race was so close that everyone was ________ ________ ________ at the finish. (屏住呼吸)
小题6:He couldn’t ________ ________ his foolish mistake. (作出解释)
小题7:经济危机首先在美国爆发。
The economic crisis ________ ________ first in the United States.
小题8:I must ________ ________ this morning and do the cleaning. (安下心来)
小题1:day and night
小题2:looking forward to
小题3:get away with
小题4: turn up
小题5:holding his breath
小题6:account for
小题7:broke out
小题8:settle down
题目分析：
小题1:考查词组：日夜day and night
小题2:考查词组：盼望，和be动词连用用looking forward to
小题3:考查词组：逃避惩罚：get away with
小题4:考查词组：出现turn up
小题5:考查词组：屏住呼吸，和be动词连用用holding his breath
小题6:考查词组：作出解释account for
小题7:考查词组：爆发，用过去时broke out
小题8:考查词组：安下心来settle down
点评：这道题的汉语意思已经给出，要学生根据句子的含义，找出缺少的词组或句型，需要用适当的形式填写，动词的时态，名词的数都要考虑。