Explanation

 "Behind" is the correct preposition

Because it shows that something is concealed behind the curtain.

Explanation

The correct preposition is "by" because it shows the agent (the one giving the treatment) responsible for making the passengers happy.

Explanation

 When changing from direct to indirect speech:

"Will" changes to "would".

"Next week" changes to "the following week".

Explanation

Praiseworthy means deserving approval or admiration

Creditable" means referring to something worthy of praise or honor.

Explanation

 Intrinsic means belonging naturally

Inherent means existing in something as a permanent

Explanation

 "Wrath" means intense anger,

Forgiveness means the act of pardoning or letting go of resentment

Explanation

A "questionnaire" is a list of questions used to gather data from respondents in research, making it the correct usage in this context. 

(a) questinnaire: This has a typo in the "t".

(b) qustionnare: This has a typo in the "t" and the "i".

(d) questionaire: This has a missing "e". 

Explanation

 The verb "compile" is typically used with the preposition "from"

To indicate the source of the information being gathered, as in "compile data from various sources."

Explanation

 “Live and let live” is a proverb

Which meaning people should tolerate others' differences and let them live their lives as they choose.

Explanation

The Bretton Woods agreement and system created a collective international currency exchange regime 

That lasted from the mid-1940s to the early 1970s

 It set global financial rules after WWII and led to the creation of IMF & World Bank.