'As if' introduces a hypothetical situation. Subjunctive 'were' used with all subjects.

'Detrimental' takes 'to' not 'for'. Correct: 'detrimental to success'.

'Keep one's head' = to remain calm and sensible in a difficult situation.

The idiom means to do things in the wrong or reversed order.

'Read between the lines' = to find implied meaning not explicitly stated.

'Know' in passive takes 'to' not 'by'. Present simple passive: 'He is known to me.'

Active: 'Even a little mouse may help a lion.' — modal 'may' retained 'even' before subject.

'Leisure' is the correct spelling — free time for enjoyment.

'Supersede' is correct — to take the place of or supplant.

The idiom 'scared out of their wits' = to frighten someone very much.

'Pallbearers' carry or escort a coffin at a funeral. Mourners grieve undertakers arrange funerals.

'Very' emphasizes a positive quality. 'Too' implies undesirable excess.

'Admits of' = allows for or leaves room for. 'Admits of no excuse' = allows no excuse.

'Appear at/for' or 'sit for' are correct for taking an exam.

The correct idiom for travelling by walking is 'on foot'.

Indirect speech: 'will' changes to 'would' when reporting verb is past tense.

With 'neither...nor' verb agrees with the closer subject. 'Simi' is singular → 'is'.

Indirect speech: past simple becomes past perfect. 'Yesterday' → 'the previous day'.

After perception verbs (watch see hear) + object + present participle emphasizes ongoing action.

Habitat:inhabitant — bird lives in sky fish lives in water.