12. The young girl sitting next to me on the plane was very nervous. She ______ before.

A. hasn’t flown         B. didn’t fly              C. hadn’t flown         D. wasn’t flying

分析：C。用于供參照的過去時間為was nervous(當(dāng)時坐飛機(jī)很緊緊)，與之相比較，hadn’t flown(沒有坐過飛機(jī))顯然屬于“過去的過去”，故用過去完成時。

13. I was giving a talk to a large group of people, the same talk I ______ to half a dozen other groups.

A. was giving            B. am giving             C. had given             D. have given

分析：C。許多同學(xué)可能會簡單地根據(jù)前面的was giving而誤選A。但事實(shí)上，此題提供的語境是：我當(dāng)時正在給一群人作報(bào)告，這個報(bào)告我曾給其他若干批人講過。由于was giving為過去進(jìn)行時，而“曾給其他若干批人講過”顯然發(fā)生在was giving這一過去時間之前，故用過去完成時，即答案選C。

14. John, a friend of mine, who got married only last week, spent $3, 000 more than he ______ for the wedding.

A. will plan               B. has planned           C. would plan           D. had planned

分析：D。首先將選項(xiàng)分成兩組：C和D為“過去組”，A和B為“非過去組”，而根據(jù)句中的got married和last week可推知，此題的答案應(yīng)在“過去組”中。然后再根據(jù)句意比較get married與plan的先后關(guān)系，顯然是先“計(jì)劃”，后“結(jié)婚”，而“結(jié)婚”在句中用了一般過去時，故“計(jì)劃”要用過去完成時。

15. They became friends again that day. Until then, they ______ to each other for nearly two years.

A. didn’t speak          B. hadn’t spoken        C. haven’t spoken      D. haven’t been speaking

分析：B。由于他們再次成為朋友發(fā)生在過去(因?yàn)?/FONT>became用的是一般過去時)，這就說明他們差不多有兩年沒說過話屬于“過去的過去”，所以要用過去完成時。