________about the student，the teacher called his parents to find out why he was so often absent from class.
| A．Concerning | B．Concern |
| C．Concerned | D．To concern |
The laboratory was well ______ for atomic research.
| A．offered | B．equipped | C．provided | D．supplied |
A poet and artist ______ coming to speak to us about Chinese literature and painting tomorrow afternoon.
| A．is | B．are | C．was | D．were |
The president spoke at the business meeting for nearly an hour without ______ his notes.
| A．bringing up | B．referring to | C．looking for | D．trying on |
Her work changed the way _______ people think about chimps.
| A．that | B．in which | C．不填 | D．all of above |
The Voice of America began during the World War Ⅱ, when Germany was broadcasting a radio program to get international ______.
| A．business | B．culture | C．support | D．information |