—How much do you know about the 3D film technology?
—A little. Not until _______the hot movie Avatar _______ some about it.
| A．did I see; did I begin to learn | B．I saw; I began to learn |
| C．I saw; did I begin to learn | D．did I see; I began to learn |
It was after he had read the requirements _______ Mr. Black realized the task was too difficult to be finished.
| A．when | B．that | C．which | D．what |
The last bus _________ two minutes before I arrived at the bus stop. What a pity!
| A．left | B．has left |
| C．was leaving | D．had left |
A new subway ________ in Changsha and it will be open to traffic when completed next year.
| A．has built | B．has been built |
| C．is building | D．is being built |
My parents always ________ great importance ______ receiving good education.
| A．pay; back | B．apply; to |
| C．attach; to | D．get; across |
The film star wears sunglasses. ________, he can go shopping without being recognized by fans.
| A．Therefore | B．However |
| C．Otherwise | D．Besides |