1 . ______ strong sunlight for a long time in summer will cause serious burns, which will make you suffer.
A.Exposed to | B.Exposing to | C.Expose yourself to | D.Being exposed to |
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2 . Evidence has shown astronauts have been affected severely because of ____ to long periods of weightlessness.
A.exposing | B.exposed | C.being exposed | D.having exposed |
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