Idioms and Phrases

The phrase 'an uphill task' means a very difficult job that requires great effort, like climbing uphill against gravity. Option B correctly identifies this as a difficult task. Option A 'At the top' and Option C 'To climb' refer to position or action rather than describing the nature of the task itself.

The phrase 'in the blues' means feeling sad, depressed, or melancholic. The term 'blues' in music refers to this emotional state. Option A 'In dumps' correctly captures this meaning of being in low spirits. The other options (confess, exaggerate, confused) are unrelated to emotional sadness.

The idiom 'out of the wood' means to have passed through danger or difficulty and to be safe. When someone is 'out of the wood,' they have successfully navigated a risky situation and are no longer in peril. Option A refers to using force, which is unrelated. Option C means antique, which is incorrect. Option D is too literal.

'The writing on the wall' refers to a warning sign or omen that something bad will happen. It comes from a biblical story where mysterious writing appeared on a wall predicting a king's downfall. Option C 'To signal' is correct as it refers to giving a warning sign. Options A, B, and D are incorrect interpretations.

To 'hit the nail on the head' means to describe exactly what is causing a situation or problem, or to do exactly the right thing to achieve a desired effect. It means being precisely correct. Option A captures this meaning perfectly. Options B, C, and D are unrelated.

To 'play truant' means to stay away from school or work without permission or good reason. It refers to being absent from duty without authorization. Option B correctly captures this meaning. Options A, C, and D are unrelated to the idiom's actual meaning.

'Above board' means open, honest, and not attempting to hide anything. The phrase comes from card games where players would keep their hands above the table (board) to show they weren't cheating. Option A is correct. Options B, C, and D are misinterpretations.

'Speak of the devil and he shall appear' is used when someone whose name has just been mentioned appears or is heard from.  

'Actions speak louder than words' means 'what one does is more important than what one says'. It fits here for the given sentence. 

This idiom describes someone born into a wealthy family, implying privilege and advantage from birth. Silver spoons were traditionally associated with aristocratic households that could afford silver utensils.

This idiom refers to a person or problem that is difficult to understand, deal with, or solve. Just as a nut with a hard shell is difficult to crack open, a "hard nut to crack" represents a challenging situation or person.

(1) Fluosol is a transparent liquid. An adjective form of the word should be used to modify the noun and not noun form. ”Transparent” is the right adjective which modifies the noun “liquid”.

(3) that it will arrive in an hour. Incorrect article is used. With the word beginning with the vowel sound we use article “an”. The word “hour” starts with the vowel sound “a” so “an” should be used.

(2) is expected to be faster. The subject “next generation” is singular so singular verb “is” should be used.