Question

use conjunction.1. the police arrived.the thieves had fled by then. 2. you must exercise regularly. you will not improve. 3. he is working sincerely. his purpose is to make some money.

Answer 1

1. The thieves had fled before the police arrived.
2.Unless you exercise regularly,you will not improve.
3.He is working sincerely to make some money.
Hope this helps you dear..
thanks for asking.. 

Answer 2

"1. The police arrived but the thieves had fled by then.

2. Unless you exercise regularly, you will not improve.

3.  His purpose is to make some money, so he is working sincerely.

  Conjunctions are used to join two sentences or clauses. Coordinating, correlative, and subordinating conjunctions are the different types. The conjunctions used above are: but, unless, and so.

  But is coordinating conjunction used to join contrasting phrases.

  Unless is used to stress a condition. The two phrases are joined by a comma.

  So is a "coordinating conjunction". "