11) I always rely on my friend. (a)
12) (b)
13) (c)
14) (a)
15) (a)
16) It has been raining for an hour.
17) They have been playing for two hours.
18) I have been writing for ten minutes.
19) I have been learning English since the 5th form.
20) How long have you been learning French?
- Я англичанка :)