It is not until the disease has progressed to AIDS ____a person begins to look sick.
| A．who | B．that | C．where | D．before |
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The good thing about children is that they __________ very easily to new environments.
| A．adapt | B．appeal | C．attach | D．apply |
at my classmates' faces, I read the same excitement in their eyes.
| A．Looking | B．Look | C．To look | D．Looked |
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