Question

Mrs Patil ____________ geography for twenty years before she retired.
a) has taught
b) had been teaching
c) was teaching
d) is teaching

Answer 1

Answer:

has taught

Explanation:

Answer 2

Mrs Patil has taught geography for twenty years before she retired.

• The sentence represents a past tense as the word before is used.
• The correct blank will be has taught, as Mrs. Patil taught them for 20 years before her retirement
• The sentence has a time frame of 20 years denoting the past.
• Thus, the correct sentence is - Mrs Patil has taught geography for twenty years before she retired.