Dr. Frank failed many times but he finally _____ to find a successful way to solve the problem.
Statistics show that shanghai subway lines will reach 350 kms by the end of this year, making the city No. 3 in the world subway length.
I admit I made a lot of mistakes in the work, and I will responsibility for them.
I would have paid a visit to you _______ possible.
A successful life is a life ____ challenges are met and difficulties overcome.
After suffering a heart attack, Michael Jackson was pronounced dead, ____ a tragic end to the world' s most popular entertainer.