78.With winter_____,it's time to buy warm clothes.

33._____over a week ago, the goods haven't arrived so far.

32.I have to leave now, so I can't help_____the house.

31.I have as much fun planting flowers as I now do_____with students.

30.Vegetables______,the next thing is to cut the carrot into pieces.

29.He persuades me_____part in the English competition.

28.The students entered the classroom,_____down to have their French lesson.

27.It is rather difficult to make friends with him, but once_____,his friendship is more valuable than any other's.

26.Scientists say that they have found a way to produce the human body'
cancer-killing cells,______new hope to cancer sufferers.

25.In the past 30 years, this old man has been sticking______the poor students to study in school.

24.I have no one______me, because the others have been assigned to do other jobs.