按要求改写下列各句，每空一词。

1. My pants are fifty dollars. (改为一般疑问句)

    _____ _____ pants fifty dollars?

2. The black socks are 2 dollars.(对画线部分提问)

    _____ _____are the black socks?

3. The store sells apples.(改为否定句)

    The store _____ _____ apples.

4. Her sweater is yellow.(对画线部分提问)

    _____ _____ is her sweater?

5. Are his shoes black?(作肯定回答)

    Yes, _____ _____.

选用测量范围时，尽量使指针在万用表盘刻度正中或距“∞”符号（）附近。

A、1/3

B、1/2

C、2/3

D、3/4