题目内容
【题目】
【1】By the time I got outside, the school bus ________(leave)．
【2】When I got home, my pet dog ________(lie)on the floor，dead.
【3】Last Friday afternoon the young man ________(hurt) in the traffic accident which happened on the highway.
【4】Every one of us was excited, for in a few minutes we ________(see) Liu Xiang appear on the sports ground.
【5】The Women's World Cup ________(not begin) until 1991 when China hosted it in Guangzhou.
【6】If those wild animals can't find enough food，they ________(die) or have to leave their habitat soon.
【7】The law of gravity ________(discover)by Isaac Newton about 350 years ago.
【8】Since last August，the old lady ________(have)bad headaches three to four times a month.
【9】Bangkok，the capital of Thailand, ________(know)as the “City of Angels”．
【10】Jack said he ________(return)the two books to the library in a week.
【答案】
【1】had left
【2】was lying
【3】was hurt
【4】would see
【5】didn't begin
【6】will die
【7】was discovered
【8】has had
【9】is known
【10】would return/was going to return
【解析】
【1】由By the time I got outside (我到外面时) 知主句应用过去完成时，其结构为：had＋动词的过去分词。
【2】过去进行时表示过去某一特定的时刻正在进行或发生的动作，结构为：was/were＋v.ing。本句中“当我到家的时候”是个特定的时刻，主语my pet dog表单数，lie的现在分词是lying，故填was lying。
【3】根据时间状语判断本句应使用一般过去时，主语和动词之间是被动关系，所以应用一般过去时的被动语态。其构成是was/were＋动词的过去分词。
【4】由in a few minutes判断要用将来时；又根据前句中的was知用过去将来时。
【5】根据时间状语判断本题应用一般过去时。
【6】在由if引导条件状语从句的主从复合句中，当表示将来意义时，主句用将来时，从句用一般现在时。
【7】由时间状语about 350 years ago知用一般过去时。主语是动作的承受者，故用一般过去时的被动语态，其构成为was/were＋动词的过去分词。
【8】由时间状语since last August知用现在完成时。
【9】根据句意可知用一般现在时的被动语态，其构成为am/is/are＋动词的过去分词。
【10】由时间状语in a week知用将来时，又由动词said知用过去将来时。
