1.C.义为“(物价)上升”.A“抬起;饲养”,B“出现”.一般rise用作不及物动词,表示某事或者某物“上升,升起”;而raise一般做及物动词,表示使某物抬升,或者养育.
2.A.How/what/when/...等特殊疑问词加上-ever,表示“无论怎么/什么/何时/...”,此句意思为:无论我怎么尝试,我都无法做到.
如果要用though或者as,就要调整语序:
Hard though/as I tried,I couldn't manage it.
=No matter how hard I tried,I.
=Although/Even though/Thought I tried hard,I.