B4

Among the e-mails waiting for me at work one morning was one from a member of my staff. It was sent from his personal e-mail address and there was only his home phone number. Thinking something was wrong, I immediately called him.
(ему)

 HE

B5

A sleepy female voice answered and told me he was at work and would come home late in the evening.
(reported speech, при переходе из прошлого в будущее will меняется на would)

COME

B6

The worst moment was when I remembered that I had recently asked staff members to give me their home numbers. I went right down to the employee’s office to apologize for my call.
(bad – worse - the worst)

 BAD

B7

Later, however, he thanked me. I had awakened his daughter, who had an exam that morning but had forgotten to set her alarm. Thanks to my call, she hadn’t missed the exam.
(степень сравнения)

 LATE