Main Events
Yesterday investigators ______ (discover) a hidden tunnel under the university.
Yesterday investigators discovered a hidden tunnel under the university.
The guard ______ (eat) when a stranger ______ (enter) the building.
The guard was eating when a stranger entered the building.
The government ______ already ______ (hide) the documents.
The government had already hidden the documents.
Investigators found a secret door that someone ______ (hide) behind a wall years ago.
Investigators found a secret door that someone had hidden behind a wall years ago.
The archaeologists opened the ancient box and realized someone ______ it before them.
(open)
The archaeologists opened the ancient box and realized someone had opened it before them.
A journalist ______ (reveal) secret documents about Area 51.
A journalist revealed secret documents about Area 51.
While the scientists ______ (study) the strange signal, the computers suddenly ______ (stop) working.
While the scientists were studying the strange signal, the computers stopped working.
Someone ______ ______ (build) the tunnel many years before.
Someone had built the tunnel many years before.
While the reporter ______ (search) the archives, she ______ (discover) classified documents.
While the reporter was searching the archives, she discovered classified documents.
While the night guard ______ the hallway, the lights suddenly went out.
(patrol)
While the night guard was patrolling the hallway, the lights suddenly went out.
Scientists suddenly ______ (find) strange signals from space.
Scientists suddenly found strange signals from space.
The students ______ (explore) the basement when they ______ (discover) a secret door.
The students were exploring the basement when they discovered a secret door.
Scientists realized the signal ______ ______ (come) from deep space.
Scientists realized the signal was coming from deep space.
The police arrested a man who ______ (send) mysterious messages for months.
The police arrested a man who had sent mysterious messages for months.
The journalist discovered the company ______ secret experiments for years.
(conduct)
The journalist discovered the company had conducted secret experiments for years.
The reporter ______ (enter) the building and ______ (see) a secret meeting.
The reporter entered the building and saw a secret meeting.
While the reporter ______ (investigate) the conspiracy, someone ______ (steal) the documents.
While the reporter was investigating the conspiracy, someone stole the documents.
The spy discovered that someone ______ already ______ (steal) the key.
The spy discovered that someone had already stolen the key.
The journalist ______ (investigate) the story when the lights ______ (go) out.
The journalist was investigating the story when the lights went out.
The professor ______ his lecture when a strange signal interrupted the computers.
(give)
The professor was giving his lecture when a strange signal interrupted the computers.
Someone ______ (steal) the files and ______ (escape) before the police arrived.
Someone stole the files and escaped before the police arrived.
People ______ (watch) the sky when strange lights ______ (appear).
People were watching the sky when strange lights appeared.
The journalist reported that the agency ______ ______ (run) secret experiments for decades.
The journalist reported that the agency had run secret experiments for decades.
Scientists discovered that the government ______ (perform) secret experiments for decades.
Scientists discovered that the government had performed secret experiments for decades.
Investigators arrived at the laboratory and discovered the scientists ______ the building already.
(leave)
Investigators arrived at the laboratory and discovered the scientists had left the building already.