1) The detective (search) the crime scene when he (find) a clue. a) The detective searched the crime scene when he found a clue. b) The detective was searching the crime scene when he found a clue. 2) She ___________ (not/see) the suspect before the incident happened. a) had not seen b) did not see 3) They _________ the case for hours before they ___________a conclusion. a) discussed/reached b) had discussed/reached 4) Choose the correct sentence: a) While the thief is escaping, the police had arrived at the scene. b) While the thief was escaping, the police arrived at the scene. 5) He (never/commit) a crime before he (get) caught last week. a) He had never committed a crime before he got caught last week. b) He had never commit a crime before he got caught last week. 6) The witness ________ for the police when she _______ the suspect. a) waited/saw b) was waiting/saw 7) By the time the police __________, the robber ______________ the building. a) arrived/had already left b) arrived/has already left 8) Choose the correct sentence: a) She had studied the case for months before she solved it. b) She studied the case for months before she solved it. 9) While they (investigate), they (discover) new evidence. a) were investigating/were discovering b) were investigating/discovered 10) Choose the correct sentence: a) He did not realize he had lost his wallet until he tried to pay. b) He did not realize he lose his wallet until he tried to pay.

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