How to Use Present Perfect Simple in English

In British English, we would use present perfect. The committee is slash our meeting today. Choose the correct form of the verb to complete the sentence. I am interested in learn or learning Spanish. It's interested in learning. So that's gerunds and infinitives. You know, what form we use after prepositions. Or I could have done better on the test. That's a sort of mistake the native speakers make. We normally use present continuous to talk about future plans. They travel to Paris next week so they are traveling - it's either a or b (probably a)