iIdioms:

1-To detect the fraud:
Fraud:
1 [C,U] the illegal action of deceiving people in order to gain money, power etc.:
• election/tax/mail etc. fraud: Companies have responded to widespread credit card fraud by issuing cards with photos on them.
2 [C] someone who pretends to be someone else in order to gain money, friendship etc.:
• It was weeks before they realized that the young man who had charmed them all was a fraud.
• I was uncomfortable sitting behind that huge desk - I started to feel like a fraud.

2-get away from sth phrasal verb [T]
1 to begin to talk about other things rather than the subject you are supposed to be discussing:
• I think we're getting away from the main issue.

3- gain entrance/entry
a) to enter a building that is locked:
• Police had to break the door down to gain entry into the building.
b) to join or become part of a system or organization:
• The company is trying hard to gain entry to the Japanese market.
c) to be allowed to come into a country:
• The two men used fake passports to gain entry into Germany.

4- to float an idea :
SUGGEST [T] to suggest an idea or plan, especially in order to find out what people think about it:
• Butler floated proposals for a number of films.