同义句转换。

1. To learn English well is very important.

    _____ _____ very important _____ learn English well.

2. Kate began to study Chinese in 2004.

   It _____ _____ over two years since she began to study Chinese.

3."Are there homeless people in your city?"

   I asked Wang Tao. I asked Wang Tao _____ there _____ homeless people in his city.

4. Millions of people speak English as their second language.

    English _____ _____ by millions of people as their second language.

5. He doesn't know where he can find a pen pal.

   He doesn't know _____ _____ find a pen pal.