答案：that　考查强调句。句意：史密斯先生生气是因为杰克上学迟到吗？It be＋被强调部分＋that...是强调句型的基本结构。此题强调原因状语，由that连接强调部分的其余内容。

　　2． You will never gain success ____________ you are fully devoted to your work.

　　答案：unless　句意：如果你不全身心地投入到工作中，你永远不会成功。unless"如果不"，符合句意。

　　3． To our great joy, not only ____________ (he, agree) to our plan, but he also provided us with $1,000.

　　答案：did he agree　考查倒装。not only...but also...，放于句首时 not only部分倒装，but also不倒装。

　　4． ________do the nurses want a pay increase, they want reduced hours as well.

　　答案：Not only'句意：护士们不仅想涨工资，而且也想减少工作时间。根据句子中的倒装形式do the nurses want和as well可知本句填Not only。

　　5．One Friday, we were packing to leave for a weekend away ____________ my daughter heard cries for help.

　　答案：when　be doing...when...这一结构中when是并列连词，不可换成while。

　　6．Even though ____________ (provide) more money, you cannot possibly run the company well.

　　答案：provided　本题考查连词引导省略性从句的用法。even though是连词，后面没有主语，说明已经省略，动词应选用v.­ing或v.­ed。从句意看，you是"被提供"，要用v.­ed表被动。

　　7．We are not prepared to compromise ____________ safety standards.

　　答案：on　句意：我们不准备在安全标准问题上妥协。compromise on sth."在......方面违背(原则)/达不到(标准)"。

　　8．As far as I know, they spent ____________ winter of 2012 in ____________ UK.

答案：the；the　句意：据我所知，他们在英国度过了2012年的冬天。