用be动词的适当形式填空。

1.My sweater_________ on the bed.

2.—_________ your shorts blue?

    —No, they _________.

3.—What color _________ his shoes?.

    —They _________ black.

4.—How much _________ her yellow sweater?

   —It _________ 20 dollars.

5.—How much _________ the red socks?

   —They _________ 5 yuan.

6.—_________ the white shirt cheap?

    —No, it _________.

接触网第一种工作票为红色，用于接触网停电检修作业。