B. Complete the sentences with the Past Simple or the Present Perfect Simple. Last month l (1) ___________(be) in the underground when suddenly the man next to me (2)_____________(ask) me for help. He (3)___________(have) a pain in his chest.l (4)___________(not know) what to do. Unfortunately, nobody else did either. All we (5)__________(can) do was coll for an ambulance. l(6) __________(feel) horrible. So late that week, l(7)_________(start) a first-aid coures.l(8)__________(have) quite a few lessons so far and I (9)_________(learn) lots of useful things. Luckily, it (10)_________(not be) necessary for me to use my skills yet.​