Question

1. I looked everywhere for the book but I … find it. A) couldn’t B) mustn’t C) shouldn’t 2. You … drive carefully on a busy road. A) canB) should C) may 3. I don’t feel well today. … I leave a bit earlier? A) mayB) mustC) should 4. Yesterday I stayed at home because I … help my father. A) can B) must C) had to 5. You … use my dictionary as long as you like.A) must B) may C) have to

Answer 1

1. I looked everywhere for the book but I … find it. A) couldn’t 2. You … drive carefully on a busy road.) should
3. I don’t feel well today. …may  I leave a bit earlier?
4. Yesterday I stayed at home because I …had to  help my father
5. You …may use my dictionary as long as you like.A) 

Answer 2

1. The correct answer is A) couldn't. The sentence indicates that despite searching everywhere, the speaker was unable to find the book. 2. The correct answer is B) should. When driving on a busy road, it is advisable to drive carefully to ensure safety. 3. The correct answer is C) should. Since the person doesn't feel well, it is recommended that they leave a bit earlier. 4. The correct answer is C) had to. The sentence suggests that the speaker stayed at home because they had an obligation or necessity to help their father. 5. The correct answer is B) may. The sentence implies that the speaker is giving permission for someone to use their dictionary for as long as they want.

Please let me know if you need further clarification or have any other questions.