第二部分：英语知识运用（共两节，满分45分）
第一节：单项填空（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21.---You have been on tour for a week in our city during May Day. What do you think about it?
---Oh, what _______different Nanjing! It isn’t _______I saw last.
A./; the one B. a; the one C. a; one D./; one
— Do remember to charge the mobile phone 12 hours when you first use it．
— ______.
| A．Made it | B．Got it | C．Understood it | D．Remembered it |
While building a tunnel through the mountains, ______.
| A．an underground lake was discovered | B．there was an underground lake discovered |
| C．a lake was discovered underground | D．the workers discovered an underground lake |
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
| A．of；at | B．by；in | C．of；on | D．on；at |
In American there are more households with pets than ______ with children.
| A．those | B．these | C．ones | D．that |
They are said to have developed a new ______ to teaching, which is said to improve classroom teaching greatly.
| A．method | B．means | C．way | D．approach |