Select the most appropriate tense form to fill in the blank. In recent years, the efficiency of the teachers _______ by the government.

Identify the tense of the given sentence: 'The world has been infected with our ill-manners.'

Select the most appropriate option for the given blank. By the time you ______ my place, I will have left.

Select the most appropriate option to fill in the blank: 'Nisha ________ for her toy, which she misplaced last week.'