Помогите!!
Open the brackets and put the verbs into the correct tense:

40. Once while I (walk) in a park of London, I (see) an old-looking man.
41. I (be) never to London.
42. He looked around and (see) a pack of wolves (come) up to them.
43. He (work) for Software Company in Spain in 1990.
44. I (call) you tomorrow.
45. She passed the test because she (study) hard for it.

40. was walking; saw41. have never been42. saw; coming43. worked44. will (можно shall поставить тоже)45. had studied