1.1.How do they get to Beijing?

A By plane.

B By train.

C By bus.

D By car.

解析：选A。A细节理解题。根据第二段“We take a plane in the morning”可知，一家人乘坐飞机前往北京。故选A。

2.2.What does the writer think of roast duck?

A Too cold.

B Very sweet.

C Pretty yummy.

D Just so-so.

解析：选C。 C推理判断题。根据第二段“It tastes very delicious”可推理，作者觉得北京烤鸭十分美味。故选C。

3.3.When do they visit the Summer Palace?

A At night.

B In the afternoon.

C In the morning.

D At noon.

解析：选B。B细节理解题。根据第三段“In the afternoon, we visit the Summer Palace”可知，他们下午去游览了颐和园。故选B。

4.4.How does the writer feel in the end?

A Quite tired.

B Very angry.

C Too sad.

D So shy.

解析：选A。A细节理解题。根据第三段“but I feel a little tired now”可直接得知，作者最后有些疲惫。故选A。