I need help in these questions. Please do them correctly. I have only 20 minutes

QUESTION 21 Choose the correct answer to complete the following sentence: The business went bankrupt after ............ an enormous amount on a product that failed to sell. investing to invest invested invest QUESTION 22 Choose the correct answer to complete the following sentence: If his boss.....him a severe reprimand for being late, he would never have been late again. have given gave has given had given QUESTION 23 Choose the correct answer to complete the following sentence: If Kate ....... happy in her current job, she would not think of resigning. is are were be QUESTION 24 Choose the INCORRECT sentence in the following: The manager accepted early retirement as he was in his late fifties. The manager, who was in his late fifties, accepted early retirement. The manager accepted early retirement when he was in his late fifties. The manager, that was in his late fifties, accepted early retirement. QUESTION 25 Choose the INCORRECT sentence in the following: All participants were asked a set of questions whom we had prepared in advance. All participants were asked a set of questions we had prepared in advance. All participants were asked a set of questions that we had prepared in advance. All participants were asked a set of questions which we had prepared in advance. QUESTION 26 Choose the INCORRECT sentence in the following: A major risk whose old businesses are facing nowadays is finding replacement for key personnel. A major risk old businesses are facing nowadays is finding replacement for key personnel. A major risk which old businesses are facing nowadays is finding replacement for key personnel. O A major risk that old businesses are facing nowadays is finding replacement for key personnel. QUESTION 27 Part III: Vocabulary (10 Marks) Form the opposites of these words by adding the suitable prefixes: A visible Un- B. legally In- C. willingly (not enough): In- D. sufficient E. advantage QUESTION 28 Match the collocations: Broker Expense Gross Patent Hard Hiring A. domestic product B. currency C. and firing D. dealer E pending F. account QUESTION 29 Choose the word that DOES NOT make sense: One way of increasing profit margins is to cut .......... costs. expense experience overhead QUESTION 30 Choose the word that DOES NOT make sense: There is a......... of professional training programs for the employees in HR department. shortage contract lack