按括号内要求完成下列句子，每空格限填一词。

1. Grace learns English by reading aloud. (改为否定句)

    Crace ____ _____English by reading aloud.

2. Tina was waiting for me when I arrived at the museum. (对画线部分提问)

    ___ was Tina ____ when you arrived at the museum?

3. We may put the flowers in the classroom. (改为被动语态)

    The flowers may ____ _____ in the classroom.

4. He isn't old enough to see this thriller. (改为同义句)

    He is ____ young ____ see this thriller.

5. 他们将建立粮食储备所来帮助贫穷的人们. (汉译英)

    They will ____ ____a food bank to help the poor people.

印度主要的粮食作物是（　　）

A．水稻和玉米

B．水稻和小麦

C．水稻和高粱

D．水稻和大豆