Final answer:
This response explains the correct words to use in idioms and provides explanations for each idiom. It also mentions the existence of similar idioms in the tutor's language.
Step-by-step explanation:
Idioms: 1. It's as
silent as the grave in here.
(Meaning: It is very quiet) 2. He's been as
sick as a dog/cat all week.
(Meaning: He has been very sick) 3. She's as
tough as old shoes/boots.
(Meaning: She is strong and resilient) 4. They're as
different as chalk and cheese/milk.
(Meaning: They are very different) 5. She's as
good as silver/gold.
(Meaning: She is trustworthy and reliable) 6. He's as
keen as ketchup/mustard.
(Meaning: He is very eager and enthusiastic) Similar Idioms: In my language, we have a similar idiom to the fourth one - 'as different as night and day', which also means that two things or people are very different.
Learn more about Idioms in English