As I______ the little grass house in the forest, my heart beat more and more quickly.

I’m familiar with you because your name ____ in our yesterday’s conversation many times.

China’s economic and social development requires more substantial reforms, as unnecessary government influence on the private sector has _______ an abuse of authority.

I’ll never forget the good trick my classmates ________ on me when I was in the primary school.

I ________ in London for many years，but I've never regretted my final decision to move back to China.