Last year, a group of kids from Guangxi traveled to Heilongjiang for a study tour. They wore bright orange jackets and people called them “Little Tangerines (小砂糖橘)”. At that time, they were popular on the Internet. These days, these kids went on a trip to Harbin again.

Last year, 11 kids went on the trip. This year, 6 returned. The other 5 graduated (毕业) and went to primary school. The kids had fun at Harbin Ice-show World. They loved sliding on ice and playing in the snow. Many saw snow for the first time and were very happy. Their trip to Northeast China will last twenty days.

1.1. What color were these kids’s jackets?

A Red.

B Yellow.

C Blue.

D Orange.

解析：选D。D细节理解题。根据“They wore bright orange jackets and people called them ‘Little Clementines.’可知，他们穿着亮橘色的外套。故选D。

2.2. ________ kids went on this trip last year.

A Five

B Six

C Eleven

D Twenty

解析：选C。C细节理解题。根据“Last year, 11 kids went on this trip.”可知，去年参加研学的有11名小朋友。故选C。

3.3.These kids were ________ in Harbin.

A sad

B happy

C afraid

D angry

解析：选B。B细节理解题。根据“The kids had fun at Harbin Ice-show World.”可知，这些孩子们很开心。故选B。

4.4. These kids will stay in Northeast China for ________ days.

A 20

B 12

C 10

D 2

解析：选A。A细节理解题。根据“Their trip to Northeast China will last twenty days.”可知，这次“小砂糖橘”要在东北三省游学20天。故选A。