1.The pencil box is _____.

A blue

B red

C black

D

解析：选A。细节理解题。根据I have a pencil box. It’s blue. 可知，铅笔盒是蓝色的。故选A。

2.The pen is ______.

A yellow

B red

C orange

D

解析：选B。细节理解题。根据I have a pen. It’s red and long.可知，钢笔是红色的。故选B。

3.I have ______ pencils.

A 5

B 4

C 3

D

解析：选C。细节理解题。根据I have three pencils.可知，我有3支铅笔。故选C。

4.The pencils are _______.

A short

B long

C big

D

解析：选A。细节理解题。根据I have three pencils. They are short.可知，铅笔很短。故选A。

5.The eraser is _______.

A big

B small

C long

D

解析：选B。细节理解题。根据I have an eraser. It’s small.可知，橡皮擦很小。故选B。