Complete the following sentences using past perfect, past continuous or past perfect continuous. 1. they waited until we were all there before they had started / started. 2. i was sure that i saw / had seen her somewhere before. 3. he had left / left school by the age of sixteen. 4. i had gone to sleep / went to sleep by the time he arrived. 5. he couldn’t write because he injured / had injured his hand
1. had started
2. had seen
3.left
4.had gone to sleep
5. injured