A) who B) that C) what D) which
A) which B) where C) when D) that
A) when B) before C) since D) as
A) what is needed B) for our needs
C) the thing needed D) that is needed
A) which B) who C) as D) where
A) provided B) unless C) until D) lest
A) For B) Since C) Before D) While
A) However B) Whenever C) Wherever D) Whatever
A) to hear B) to hearing C) to having heard D) to have heard
A) to start B) having started C) start D) to have started
A) Did B) Done C) Doing D) Being done
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