Answer:
a) refuse, refuse
Step-by-step explanation:
Select the pair of homonyms that are more suitable in this sentence. The constructor could not refuse the offer made by the President, but secretly did not want to deal with the huge amount of refuse made from such a large dirt production.
Refuse means both of these definitions:
1. One's actions prove one's refusal to accept anything.
2. Left as something of no use.