a test on Mathematics will replace a test in Mathematics because –
on (Prep.) is used for talking about something as in –
a book on South Africa
She tested us on Verbs.

Correct Option: B

a test on Mathematics will replace a test in Mathematics because –
on (Prep.) is used for talking about something as in –
a book on South Africa
She tested us on Verbs.

of will replace for because –
of (prep.) is used after Nouns formed from Verbs.
Here, indication is the Noun form of indicate (Verb).
Hence, is a strong indication of is the right usage

Correct Option: B

of will replace for because –
of (prep.) is used after Nouns formed from Verbs.
Here, indication is the Noun form of indicate (Verb).
Hence, is a strong indication of is the right usage

administrative will replace administration because –
an Adj. qualifies a Noun and administrative is
an Adj. qualifying ability (Noun).
Hence, a good sense of design and administrative ability is the right usage

Correct Option: B

administrative will replace administration because –
an Adj. qualifies a Noun and administrative is
an Adj. qualifying ability (Noun).
Hence, a good sense of design and administrative ability is the right usage

has will replace have because –
The increasing mechanisation of life is a Singular Subject and it agrees with Singular Verb.
Hence, has led us farther away from daily contact with nature and is the right usage

Correct Option: B

has will replace have because –
The increasing mechanisation of life is a Singular Subject and it agrees with Singular Verb.
Hence, has led us farther away from daily contact with nature and is the right usage

tolerable will replace tolerably because –
an Adj. qualifies a Noun and tolerable is an Adj. and tolerably is an Adv.
peal (Noun) : a loud sound or series of sounds
monotonous (Adj.) : never changing and therefore boring
jangle (Noun) : a hard noise like that of a metal hitting metal.
mitigated (Verb) : to make something less harmful, serious, etc.
Hence, tolerable only when mitigated by remote distance and sentimental association is the right usage.

Correct Option: C

tolerable will replace tolerably because –
an Adj. qualifies a Noun and tolerable is an Adj. and tolerably is an Adv.
peal (Noun) : a loud sound or series of sounds
monotonous (Adj.) : never changing and therefore boring
jangle (Noun) : a hard noise like that of a metal hitting metal.
mitigated (Verb) : to make something less harmful, serious, etc.
Hence, tolerable only when mitigated by remote distance and sentimental association is the right usage.