1£®What interested me most was how the man escaped from Cuba and made his way to Miami.

2£®That her son came back safely made Mrs. Wang feel relieved.

3£®Who will be in charge of the project is quite important.

4£®Which one is the healthiest is uncertain.

5£®When/Whether Mr. Green will return from China by plane hasn’t been decided yet.

6£®Where/How/When Bob got such important information is still a mystery.

7£®How our brain works is being studied by the scientists.

8£®Why Johnson gave up such a good chance is still unknown.

9£®It was reported that the two companies would carry out a project together.

10£®It doesn’t matter much whether you will come to the party or not.