Anglais : Conjugaison du Past Simple

Read the sentences about scientific progress and fill in the blanks using the Past Simple of the verbs in brackets. 1. In 1903, the Wright brothers ________ (fly) the first motor-powered airplane. 2. Alexander Graham Bell ________ (invent) the telephone in 1876. 3. Scientists ________ (discover) many new vaccines in the $20^{th}$ century to improve health. 4. Computers ________ (become) smaller and faster over the last few decades.