______ people have become masters of their country ____ science can really serve the people.
| A．It is only then ;that | B．It is that;when |
| C．It is only when; that | D．It is when;when |
相关试题
—What do you have for breakfast?
—I often have ________ or ________.
| A．breads; noodles | B．bread; noodles | C．breads; noodle | D．bread; noodle |
My school isn't far from here. It's only ________ walk.
| A．fifteen minutes | B．fifteen minutes' | C．fifteen minute's | D．fifteen minute |
— Who is in the reading room? The lights are all on.
— ___________.
| A．Nothing | B．None | C．No one | D．No |
The conference has been held to discuss the effects of tourism _______ the wildlife in the area.
| A．in | B．on. | C．at | D．with |
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