English

The word 'gingerly' means to do something in a careful or cautious manner. Among the options, 'Cautiously' is the correct synonym, while the others have different meanings.

The phrase 'broke off' means to stop suddenly, which fits the context of stopping a speech midway due to being unprepared. The other options do not convey this meaning correctly.

The phrase "backstairs influence" refers to secret, indirect, and often unfair influence used to achieve a goal, which matches option D. This idiom implies using hidden or unofficial channels rather than open or proper means.

The term 'Ambidextrous' refers to a person who can use both the right and left hands equally well. The other options do not relate to this meaning.

The phrase "out and out" means "thoroughly" or "completely." Therefore, saying "He is 'out and out' a reactionary" means he is thoroughly a reactionary, making option B the correct choice.

A disease that spreads by contact is described as 'contagious.' 'Infectious' refers to diseases caused by pathogens but does not specify the mode of spread. 'Incurable' and 'fatal' describe the outcome or treatability, not the mode of transmission.

A numismatist is a person who collects or studies coins, making option D the correct answer. Philatelist refers to a stamp collector, ornithologist studies birds, and statistician works with data analysis.

The phrase 'came across' means to meet or find someone or something unexpectedly, which fits the context of meeting an old friend in Empress Market. The other options do not convey this meaning appropriately.

The correct spelling of the word meaning cruel or harsh behavior is 'Brutality,' which corresponds to option B. The other options are misspellings.

Coercion means the use of force or threats to make someone do something against their will, which directly matches the question's definition.