It was seven o;clock in the morning ____ he came back.It was really at seven o’clock ___ he came back from work this morning.
Having mastered the technologies of manned spacecraft, China became the third country in the world ______ manned spaceflight independently.
______ sweet, this type of flower sells the best in the market.
The most widely accepted theory about the beginning of drama is based on the concept ______ drama evolved from ritual.
The growing speed of a plant is influenced by a number of factors, ______ are beyond our control.
______ Chief Engineer, as his family had expected, made his father happy and proud.