Question

There are two verb tense errors in this paragraph. Correct them: Up until recently, the history of human-powered flight was not improved much since the ancient Greeks write about Icarus flying too close to the sun and melting the wax that held his feathers on.

Answer 1

has* not improved, wrote* about Icarus.

Answer 2

Up until recently, the history of human-powered flight was not improved much since the ancient Greeks wrote about Icarus flying too close to the sun and melted the wax that held his feathers on.

Explanation:

The two corrections made are: wrote instead of write and melted instead of melting since we are talking about the past, we have got to use simple past tense instead of present continuous tense.

The general format of simple past tense is

Subject + verb + -d, -ed, -ied  or irregular form + rest of the sentence.