19．The Internet and the effect______________brought about did a lot of good to our daily life and work.
| A．that | B．what | C．which | D．It |
________ Richard offers to his friends is honesty and happiness.
| A．That | B．Which | C．Whom | D．What |
Living with host families, ________ there may be other college students, gives her the chance to learn more about the new culture.
| A．on which | B．about which |
| C．in which | D．among which |
She has a gift for creating an atmosphere for her students ________ allows them to communicate freely with each other.
| A．where | B．which | C．what | D．who |
I could see a whale ________ by a pack of about six other killers.
| A．having been attacked | B．being attacked |
| C．to be attacked | D．be attacked |
The plan has to be ________ to meet the real situation.
| A．adjusted | B．adopted | C．operated | D．reflected |