Some Math problems in this book are     difficult for the students       work out.

A．so, that

B．not, but

C．such, that

D．too, to

下列词语没有错别字的一项是

A．名不副实礼上往来呕心沥血如愿以偿

B．淋漓尽致麻木不仁络绎不绝明察秋毫

C．流离迁徙奴颜婢膝气息奄奄迫不急待

D．轻歌曼舞凭白无故前仆后继盛气凌人