A.while | B.before | C.after | D.as soon as |
A.as | B.while | C.then | D.when |
A.as | B.which | C.for | D.because |
A.so that | B.because | C.if | D.though |
A.because | B.now that | C.whenever | D.even if |
A.for | B.because | C.because of | D.that |
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