Помогите!
Find and correct the mistakes in the sentences:

30. I’m not understanding you, can’t you say it again, please?
31. Yesterday we have visited a lot of night clubs.
32. What do you think about now?
33. He is having four children.
34. She usually will finish work at 6 in the evening.

30. I do not understand you, can you say it again, please? 31. Yesterday we visited a lot of night clubs. 32. What are you thinking about now? 33. He has got four children. 34a. She would usually finish work at 6 in the evening. 34b. She usually finishes work at 6 in the evening.