1, She was tired last night so she went to bed early.

2, I suggest collecting empty and used cans.

I suggest that we collect empty and used cans.

3, I enjoy playing tennis.

4, It took us five hours to learn English.

5, She has been working in this company for 5 years.

6, Because the house was cheap, we decided to buy it.

7, Do you the man who is standing there?

8, Do you remember the day when you started school?

9, Many lakes and rivers have been destroyed by pollution from paper mills.

10, Although the Café was crowded, we found a table for coffee.

11, The girl, who is wearing a pink dress, is a singer.

12, People are worried that the oil will pollute the sea.