8._______is the custom, the investigators carried out a painstaking search of the debris after the air crash.
A: What
B: As
C: Which
D: That
A: What
B: As
C: Which
D: That
举一反三
- After being rescued from the air crash, ...ad much to ________.
- what happened on Monday ？（） A: A train crash occurred causing minor injuries. B: Investigators found out the cause of the accident. C: Crews rescued more passengers from the site. D: A commuter train crashed into a building.
- After making a great effort, we finally ______ the plan. A: carried on B: carried off C: carried over D: carried out
- After being rescued from the air crash, the people agreed that they had much to ________.
- ______has been pointed out before, air pollution is becoming serious in cities. A: That B: What C: Which D: As