Exercise 6: Giới từ chỉ thời gian  ( Prepositions of Time )
1. Columbus sailed to the Americas .................. the 16th century. 
2. The Beatles were popular. .................. the 1960s 
3. I graduated from university. ...................2001.
4. His birthday is. ........... June .
5. I  usually go to my parents house. ................ Christmas. We eat turkey together. .......... Christmas Day. 
6 . The train leaves ............... tomorrow morning. ...........8:00 Am.
7. I love going skiing. ............ January .
8. We met atthe restaurant. ...........8 pm. 
9. The class is. ............... 9am .............. Monday mornings. 
10. I like to drink coffee. ..................the morning and tea. ................ the afternoon. 
11. We went out for dinner. ............. last Wednesday. 
12. She left London. ...................the 4th of March. 
13. I had a partyparty. ............... my birthday. 
14. Lucy went to New York. .................... New Year.
15.We're meeting. ................. lunchtime ................ next Tuesday.