Ответ:

добавь везде ing окончание и перед словами was

Объяснение:

например. was sanding и т.д

a) was sending

b) was talking

c) was not writing

d) were running

e) were learning

f) was getting up/ was having

g) was not teaching

h) was burning

i) were growing

j) was freezing

k) was not waiting

l) were correcting

m) was not leading

n) was blowing

o) was leaving

PS: Past Continuous

was/were + Ving           (v-verb)