Fill in the Blanks

An alibi is a claim or piece of evidence proving a person was elsewhere when a crime was committed. When new evidence breaks or disproves this alibi, it means the defendant's claim of innocence is no longer believable.

A plan is revised, a disease is diagniosed, a secret is disclosed and things revive after a decline. Hence, option 3 is the correct answer.

We take 'lessons on' ethics, morality, etc, but we take 'lessons in' subjects. As forgiveness is not a subject but an attribute, hence, option (1) is the correct answer.

Whenever we refer to a period or duration of time we use preposition 'for'. Usage of auxilary 'have' (present tense case) eliminates the chances for the usage of option 3 and 4, as both of them are the cases of past tense. Hence, option 2.

Case of article usage. Though the word 'European' starts with a vowel but it does not make a vowel sound. Hence, article 'a' is the correct choice.

“To be convinced of” is an idiom which means “to be of the confirmed view'' which is conveyed in the given sentence. Hence, (1) is the correct answer.

Case of present perfect tense. Hence, (3) is the correct answer. Present perfect tense shows that something started in the past and continues in the present.

“To wipe out” is an idiom which means “to clear away” which is conveyed in the given sentence. Hence, (1) is the correct answer.

In a compound sentence dealing with a coordinate clause, both the clauses should be in the same tense. Hence, (4) is the correct answer.

“To consist in” is an idiom which means “to be filled with”/"lies within" which is conveyed in the given sentence. Hence, (3) is the correct answer. 

“To come along” is an idiom which means “to accompany with” which is best conveyed in the given sentence. Hence, (1) is the correct answer.

The given sentence refers to the present perfect continuous tense indicating a period of time. Hence, (4) is the correct answer.

“To keep under” is an idiom which means “to keep under surveillance” which is conveyed in the given sentence. Hence, (3) is the correct answer.

“To hanker after” is an idiom which means “to run after” or “to pursue madly” which is best conveyed in the given sentence. Hence, (1) is the correct answer.

”To solve” is the only option which has an infinitive. Moreover, adjective 'too' is always followed by infinitive 'to'. Hence, (2) is the correct answer.