Question

3) Werb; Mr. Ghosh ------yesterday
about the sample materials you
wanted. *
a.called
b.has called
c.was calling
d.have called​

Answer 1

Answer:

was calling is the answer you need

Answer 2

Answer:

Mr. Ghosh called yesterday about the sample materials you wanted.

Explanation:

The verb, called, is in the simple past tense. The action was done in the past and the completion time is also mentioned.

Mr. Ghosh called yesterday- tells us that he did the action in the past, that is, yesterday.

Another example-

1. He went on a walk.
2. This cat ate the fish.
3. They burned the sticks.
4. Tom called last week.

All the verbs in the sentences above are in the simple past tense.

Conclusion:

Mr. Ghosh called yesterday about the sample materials you wanted.