Some people go back to university to ____ more knowledge after having worked for many years.
| A．require | B．inquire | C．acquire | D．request |
The Great Wall is __________ tourist attraction that millions of people pour in every year.
| A．so well-known a | B．a so well-known |
| C．such well-known a | D．a such well-known |
She has a gift for creating an atmosphere for her students_________ allows them to communicate freely with each other.
| A．which | B．where | C．what | D．who |
The days are gone__________ physical strength was all you needed to make a living.
| A．when | B．that | C．where | D．which |
Was it ______ he was playing volleyball on the playground_________ he got hurt?
| A．that; when | B．when; that |
| C．that; where | D．where; that |
The owner of the mine was ____________ to twenty years because he had broken the law to employ children as miners.
| A．sentenced | B．trapped | C．sheltered | D．buried |