A.and; unlikely | B.but; impossible | C.and; possible | D.but; probably |
A.whenever | B.until | C.while | D.wherever |
A.When | B.As | C.While | D.Since |
A.when | B.as | C.in case | D.unless |
A.until | B.as | C.before | D.the moment |
A.since | B.unless | C.once | D.until |
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