請幫手!!

In the following sentences, 10 are incorrect. Identify them and make the appropriate correction.
1. I m sure that we can earn a handsome profit in this venture.2. You had better to be more patient in handling customers' complaints.3. Judy has abundant experience in this field, therefore, she can always manage her job in an effective manner.4. He has returned a mail to reassure the disappointed customer.

1. I ' m 2. profits 3. best 4. most 5. complaint 6. manages 7. manners 8. had 9. returned
10. disappoint

1.CORRECT

2.CORRECT

3.WRONG---Judy is rich in experience in this field. Therefore, she can always manage her job efficiently ( 或者 effectively 也可以) In an effective manner 有些奇怪，似廣東話式的英文，用 adverb 會比較好

4.WRONG---He has replied a mail 才對