19. It is reported that China has created the first man-made sun in the world recently, ______ ?
If the new arrangement doesn’t _____, we’ll go back to the old one.
All the girls swam in the lake except two, who _____ halfway.
—Did you reach the top of the mountain?—Yes. Even I myself didn’t believe I could______ it.
His aunt’s letters _____him of those beautiful days when they used to live together in his hometown.
He has been fired and will have to _____over charge of his office tomorrow.