Put the following sentences into the Past Perfect Continuous:
1. He was dizzy. He (work) on the computer since morning.
1) had been working
2) had worked
3) was working
2. I was never nervous. I never (play) against her before and I didn’t know how good she was.
1) had never played
2) played
3) had been playing
3. I knew the facts of the accident because I (read) the report.
1) had been reading
2) read
3) had read
4. My eyes ached because I (read) for three hours.
1) was reading
2) had been reading
3) had read
5. The children were filthy. They (play) in the garden, and they were covered with mud.
1) were playing
2) had been playing
3) played