Ninety ____ teachers and students plant _____ trees every year.

She went out with the door unlocked by _ although she knew early that it would result in theft

_ I went to the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery.

rd to make what the teachers teach______,andyou’ll all make good progress in your studies.

Many companies give away small quantities of their produce as samples ____ people can try them before buying them