1. Fill in the blanks with the appropriate modal verb: should, shouldn’t, must, mustn’t, have to, don’t have to.

a) As a dental technician, you ____ take care of your tools and equipment to ensure they are in good working condition. b) You ____ wear protective gloves and masks to prevent contamination in the workplace. c) Dental technicians ____ achieve a high level of precision when creating dentures that ____ fit perfectly in the patient’s mouth. d) You ____ stay up-to-date with the latest advancements in oral health to provide the best possible service to your patients. e) Dental technicians ____ harm or spread infections to patients, so they ____ follow strict hygiene protocols. f) You ____ have to repair damaged dentures, but you ____ have to replace missing teeth with new ones. g) It ____ be your responsibility to prevent any harm to patients by following proper procedures.

1. Rewrite the following sentences using the given modal verbs: should, shouldn’t, must, mustn’t, have to, don’t have to.

a) It is necessary for dental technicians to take care of their tools and equipment. b) It is important to achieve a high level of precision when creating dentures that fit perfectly. c) Dental technicians are responsible for preventing harm or spreading infections to patients. d) It is not necessary to repair damaged dentures, but it is necessary to replace missing teeth with new ones. e) Dental technicians need to stay up-to-date with the latest advancements in oral health.

1. Complete the sentences with the correct form of the modal verbs: should, shouldn’t, must, mustn’t, have to, don’t have to.

a) Dental technicians ____ wear protective clothing to prevent contamination. b) You ____ take care of your tools and equipment regularly. c) It ____ be your responsibility to ensure that dentures fit perfectly. d) Dental technicians ____ harm patients or spread infections. e) You ____ stay up-to-date with the latest techniques in dentistry. f) Dental technicians ____ achieve a high level of precision in their work. g) You ____ replace missing teeth with new ones, but you ____ repair damaged dentures.

1. Match the modal verbs with their corresponding meanings:

a) should b) shouldn’t c) must d) mustn’t e) have to f) don’t have to

Meanings: 1) Strong recommendation 2) Strong prohibition 3) Obligation 4) Lack of obligation 5) Necessity 6) Lack of necessity

Answers: a) 1 b) 2 c) 3 d) 2 e) 5 f) 6