_______behind a tall tree, the little girl was not noticed by anybody at all.
| A．Seated | B．Seating | C．Seat | D．To seat |
I’d appreciate _______ if you could let me know in advance whether you will come or not.
| A．it | B．you | C．one | D．what |
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 |