Not getting the praise he needs, this can make him feel like his hard work is for nothing.
I have gone
Present perfect tense is has/have + past participle (of the verb)
Advised
behaving as someone, especially the speaker, would recommend; sensible; wise.
Compound. The simple sentence would be 'they were very busy'
Answer: trust, the roommate betrayed the trust of his other roommate.
Explanation: