1、This / That/ It is/ was＋the＋序数词＋名词＋从句(从句中的时态要用完成时态；如前为is，则用现在完成时，如为was则用过去完成时)，故选C，再如：1、It is the first time he has been to Beijing.2、That was the second time I had listened to his lecture.二、It's time…句型是中学英语里使用频率较高的句型，其意为“该是……的时候了”。用法灵活多变，也是大家以掌握的句型。现就其有关句式归纳如下：⑴ It's time for + n
2、.“该是（干）……的时候了。”例： Boys and girl, It's time for class. 同学们，该上课了。⑵ It's time + (for sb.) to do sth. .表示“该是（某人）干……的时候了。”例： It's time for you to clean the classroom. 该是你打扫教室的时候了。 It's time to go to school. 该去上学了。⑶ It's time + that clause 时，that可省略，time可由high,ab
3、out修饰，从句中的谓语动词有两种形式，或者用动词的过去式(be用were)；或者用shoud + 动词原形（should不能省略)。此句型为虚拟语气句型，表示“现在某人该做某事了”。含有该事早该去做而未做，现在去做似乎都为时已晚的意思。例： It's time （that）we went to bed. 我们该去睡觉了。 It's high time that the article were published. 发表这篇文章是适时的。 It's time you should do cleaning. 你该去打扫卫生了。⑷ It's +
4、 the/序数词+ time +to do sth. 表示某人第几次做某事。例： It is my first time to write letter in English. 这是我第一次用英语写信。⑸ It's + the+序数词+ time+ that clause.也 表示某人第几次做某事。例： It is my first time that I've even written letters. 这是我第一次用写信。句型⑷ 句型 ⑸ 可以互换。Itishigh/abouttimethat 正是干……的时候了high/about只是对
