11. It is because people are likely to stay indoors ______ the virus can spread easily ______ people often catch colds.
A.and, that | B.so, that | C.therefore, so | D.that, that |
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11. It is because people are likely to stay indoors ______ the virus can spread easily ______ people often catch colds.
A.and, that | B.so, that | C.therefore, so | D.that, that |