The modals that correctly complete line 1 are, respectively, 
The prepositions that complete line 3 are, respectively, 
The pronoun that completes line 5 is 
The correct noun phrase to complete line 12 is 
Check the alternative in which … wears off …, in line 16, means the same as in 
… therefore … in line 17 can be correctly replaced by 
According to the passage, it is correct to conclude that 
The verb forms that correctly complete lines 14 and 15, respectively, are 
The only –ing form which functions as an adjective in the passage is 
The verbs in which the final –ed is pronounced, respectively, as the phonemes /id/, /d/ and /t/ are 