下列句子中，加横线词古今同义的一项是（ ）①既窈窕以寻壑 ②幼稚盈室 ③奚惆怅而独悲 ④阮籍猖狂 ⑤一介书生 ⑥辩乎荣辱之境 ⑦零丁孤苦，至于成立 ⑧腹犹果然 ⑨臣之进退，实为狼狈

When you _____ into the gallery, you feel as ifyou____ inside a fragile, white seashell.

Some researchers believe that there is no doubt______acure for AIDS will be found.

__________ the style of the singer, but they also followed him everywhere.

can I do for you—I’d like to buy a present for my son,______at a proper price but of great use