英语作业，很简单，急啊

书桌上有一台电脑。
There is a computer on the desk.

我妈妈最喜欢的食物是米饭。。
The food my mother likes is rice.
把句子翻译成英语，然后进行句型转换（否定句，肯定句，一般疑问句，特殊疑问句）
1.那些梨在树上。（划线 在树上）
Those pears are on the tree.
Those pears are not on the tree.

Are those pears on the tree?

Where are thre the pears
2.我的书桌上有一台灰色的电脑。（划线 灰色的电脑）
There is a grey computer on my desk.

There is not a grey computer on my desk.

Is there a grey computer on my desk?

What colour of the computer is there on your desk?

3.椅子上有一个苹果。（划线 一个）
There is an apple on the chair.
There is not an apple on the chair.
Is there an apple on the chair.

How many apples are there on the chair?
4.床上有七件外套。（划线 七件）
There are seven coats on the bed.
There are not seven coats on the bed.
Are there seven coats on the bed?
How many coats are there on the bed?

5.我最喜欢的食物是蛋和肉。（划线 蛋和肉）

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