Вот по книге! : put the verbs in brackets in the correct tense. b).how ) your friend? с я знаю что комуто не охота! но

B)How long have you known your friend?
с).I love tennis I  have been playing tennis since I was 10.
d).This crossword is difficult.I have been doing it for 40 minutes.
e).Your English is good.How long have you been learning it?