13.By the end of last week,they __D__ the bridge.

13.By the end of last week,they __D__ the bridge.
A.has completed B.completed C.will complete D.had completed
14.Ben hates playing __B___ violin,but he likes playing ____ football.
A.a…the B.the… the C./ …the D.the…/
15.By the time he was 4,he __B____ a lot of German words.
A.had learned B.has learned C.learned D.learns
16 .Jim turned off the lights and then ___B__ the classroom.
A.was left B.had left C.has left D.left
17.They _____C____ in Guangzhou since 2000.
A.lived B.had lived C.have lived D.were living
18.The train from Beijing____D___ ten minutes ago.
A.has arrived B.was arriving C.arrived D.had arrived
19.The students _____B____ their classroom when the visitors arrived.
A .have cleaned B.had cleaned C.was cleaned D.have been cleaned
20.Fergie____D___ the project in one hour.
A.have finished B.will finish C.finishes D.has finished
21.The man _____B___ his coat and went out.
A.put on B.had put on C.will put on D.was putting on
22 My mother___A___ in that factory at the age of 18.
A.had worked B.has worked C.worked D.works
23.Dad ____D____ while he _______ TV.
A .fell asleep…watch B.was falling asleep…watched
C.fell asleep……was watching D.had fallen asleep…watched