A．SinceB．AlthoughC．HoweverD．Only if

【C12】A．stillB．althoughC．howeverD．but

【C8】A．if onlyB．only whenC．only tooD．but only

【C7】A．if notB．althoughC．evenD．hence

A．only whenB．soon afterC．even ifD．as if

【C7】A．SinceB．BeforeC．AsD．If

【C10】A．UnlessB．AlthoughC．SinceD．If