She was too old to climb Mt. Fuji.
= She was ( ) old ( ) she couldn't climb Mt. Fuji.
We could not play baseball yesterday ( ) it was raining. [神奈川県]
(1)or (2)if (3)because (4)but
Please be quiet ( ) she is playing the violin. [東京工業大附属工業高]
(1)before (2)until (3)while (4)during