Question

we should think twice ....we do any work .suitable linker​

Answer 1

Answer:

We should think twice before we do any work.

Explanation:

Answer 2

The suitable linker is 'before'.

We should think twice before we do any work.

* Here, there are two independent clauses which has been linked with a word 'before'.

It acts as a conjunction here.

* The word 'before' can be used as:

Preposition- He shifted to his native place before the crisis.

Conjunction- Look before you leap.

Adverb- I already met my friend before.