Fill in the blank with the most suitable collocation.
They are ______________ on the current projects of constructions.

Correct option is C

The correct phrase to fill in the blank is (c) making progress.
Correct sentence:
They are making progress on the current projects of constructions.
Explanation:
The correct collocation is “make progress”, which means to move forward or improve in a task or project.
Meaning of "Making Progress":
· English: Advancing, developing
· Hindi: प्रगति करना ✅
Meanings of all other options:
· Make progress: Base form; needs continuous here ❌
· Having progress: Grammatically incorrect ❌
· Inviting progress: Incorrect collocation ❌