your cup of tea:
what is not your cup of tea?
What is your cup of tea?
It means something that you enjoy or have an interest in. For example, if someone says, "I love science fiction movies, but romantic comedies are not my cup of tea," it means they prefer science fiction over romantic comedies.
best thing since sliced bread
What did you think was the best thing since sliced bread when you where a kid?
It refers to something or someone that is considered extremely good, innovative, or useful. It implies that the thing or person is highly appreciated and valued.
piece of cake:
Which subjects at school was a piece of cake for you and which subject were difficult?
It means something that is very easy or simple to do. For example, if someone says, "Don't worry, solving this math problem is a piece of cake," it means the problem is not difficult at all.
stabbed in the back
Why do you think some people stab their friends or co-works in the back sometimes?
It refers to being betrayed by someone you trusted. It implies that someone has done something harmful or deceitful to you when you least expected it.
right place at the right time
Can you think of something that happened to you in the past where you were at the wrong place at the wrong time and tell me what happened?
It means being in a fortunate situation or position where one benefits from being present or taking action at the perfect moment.