Complete the sentences with the verbs in the correct form.1) Kate was tired because she _____________________ (write) a test for a long time.2) John ___________________ (wash) his car when the rain _____________ (start).3) I ______________ (sleep) before my maths exam last week because I ___________ (revise).4) Wendy _____________ (cook) since morning before her guests ___________(arrive).