When I saw the gardener, he __

When I saw the gardener, he ___ trees.

A is cutting down

B will be cutting down

C cut down

D was cutting down

Correct Answer: Option D

when দ্বারা প্রথম clause টি past indefinite tense হলে second clause টি past continuous tense -এ হবে ।সুতরাং শূন্যস্থানে was cutting down হবে । ।