句型转换：按要求改写下面句子。

This problem is very difficult. We can't work it out. (合并为一句)

This problem is ________ difficult for us ________ work out.

句型转换：按要求改写下面句子。

Hurry up, or you'll be late for class again. (改为同义句)

________ you ________ hurry, ________ ________ be late for class again.

句型转换

yourself, mend, you, it, can(连词成句)

________________

句型转换

He is OK. The doctor does a small operation. (连成一句)

He'll ________ OK ________ the doctor does a small operation.

句型转换

He had many good friends. (改为否定句)

He had ________ good friends.

句型转换

He didn't have much money with him. (改为肯定句)

He ________ much money with him.

句型转换

She's swimming very well. (用can改写)

She ________ ________ very well.

句型转换

We are happy to meet you again. (改为感叹句)

________ ________ we are to meet you again!

句型转换

They were talking when their teacher came in. (对画线部分提问)

________ ________ they ________ when the teacher came in?

句型转换

He did his housework yesterday. (用this time yesterday改写)

He ________ ________ his housework this time yesterday.