Jonadab
Mystery: Current popular mystery authors include John Grisham (whose books usually involve lawyers and investigation; a number of them have been made into movies; you can read them in any order), Lilian Jackson Braun (books about a woman...

• When I heard that, I had to smile at her behavior, it's so cute.
• When I heard that, I can't help but smile, it's so cute.

真斗

• I wonder are there any exercises which improve my bad posture.
• I wonder if there are any exercises to improve my bad posture.

Mike

• The party time passed quickly, and we wanted to continue the party.
• Time went by quickly, but we wanted to continue the party.

Mike

• I had a party with my co-workers that I have a good relationship with.
• I had a party with some of my closest co-workers. that I have a good relationship with. "that I have a good relationship with"と言ったら分かることができるけど、「Closest friends」や「Closest co-workers」はもっと自然そうです。

真斗

• I've been busy at work recently, so I didn't have plenty time of sleep.
• I've been busy at work recently, so I don't have enough time to sleep.

Taro
It's good to let your hair down once in a while ね。 時々ゆっくりをする、いいですね。

Sashasimba123
hope u had a ball :)!!!!