题目内容：

阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

In Florida, one McDonald's customer started a pay-it-forward chain that   other 249 customers to be generous and do the same.

ABC News reports the spirit of   is in the air as 250 drive-thru customers at a local McDonald's paid for the meals of the people next to them.

When Torie Keene was paying for her food on Wednesday morning, it occurred to her to pay for the meal of the car next to her. Keene then   told McDonald's cashier Figueroa to greet the other customer "Merry Christmas". The next customer was   when Figueroa said her food was already paid by the   car. That's   she thought that she would love to do the same and the domino effect (多米诺效应)   .

"It kept going and going" Figueroa told ABC news. "After the 15th car, I started   the number of people participating   a piece of paper."

Figueroa said the chain   almost lasted for her entire shift. "I just kept giving everyone the same   , and they were all so astonished and so happy," she continued. "One lady   paid for the meals of the next three cars behind her."

While people were amazed by how   they could get, Figueroa said she had "never experienced   。like that before" in her 12 years of working for McDonald's. "I feel very   to have been a part of all that," the cashier said.

Keene contacted Figueroa on Facebook when the pay-it-forward chain   in the local news. She revealed that she   the long chain of kindness, adding that she was   by the number of people who continued her good   when she was "only trying to   someone's day."

1.A．invited    B．instructed    C．indicated   D．inspired

2.A．receiving   B．gaining      C．giving      D．taking

3.A．purposely   B．particularly C．especially  D．casually

4.A．infected    B．guided        C．reminded     D．affected

5.A．unusual     B．previous     C．next        D．familiar

6.A．when       B．where        C．how         D．what

7.A．created     B．disturbed     C．made        D．followed

8.A．accounting B．marking       C．estimating  D．evaluating

9.A．in         B．under         C．on         D．at

10.A．reception B．reaction     C．reflection   D．range

11.A．order      B．request       C．message     D．suggestion

12.A．still     B．also          C．even        D．merely

13.A．mean       B．generous     C．lovely      D．selfish

14.A．something B．it            C．everything  D．all

15.A．blessed    B．helpful      C．interested   D．doubtful

16.A．took out  B．came out      C．picked out   D．stood out

17.A．produced   B．released      C．started     D．spread

18.A．surprised B．puzzled       C．confused     D．delighted

19.A．process    B．idea          C．decision    D．deed

20.A．strengthen B．loosen        C．lengthen     D．brighten