fill in the correct forms of the verbs (past simple of

Fill in the correct forms of the verbs (past simple of past continuous) in brackets.
1 I (read) a book when he (come) in
2 It (rain) this morning when I (get up)
3 I (have) tea when the telephone (ring)
4 When you (come) in, I (write) an essay
5 He (sit) in a cafe when I (see) him
6 The boy (fall) down while he (run)