They finally thought ______ a plan and solved the problem.

They finally thought ______ a plan and solved the problem. They finally thought of a good idea to solve the problem 改写同 The scientists finally solved this problem after many years They have had the problem solved. they have had the problem solved Finally they succeeded -------- the problem Finally,they found a ____ to the problem.(solve) in the end they solved the problem [ ] [ ],they solved the p The problem __________, they went home. being solved B. has This is( )they solved the problem in hte cityAthatBhowCwhen They consider ____ the problem should be solved at once They finished the plan ______,and achieved great ______.[ ]