Question

_____last month the weather has improved.​

Answer 1

Answer:

After ..............

Answer 2

Answer:

The appropriate sentence should be as follows:

Since last month the weather has improved.

Explanation:

preposition:-

A preposition is a word used to link nouns, pronouns, or expressions to other words within a judgment. They act to connect the people, objects, time and locales of a judgment. Prepositions are generally short words, and they're typically placed directly in front of nouns. In other cases, you’ll discover prepositions in front of gerund verbs.

Thus,

        The Error-free sentence should be as follows:

"Since last month the weather has improved."

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