题目

All        I can do        go shopping. A.what;to         B.which;is to C.that;is to      D.that;to    答案：C先行词是all,everything,nothing,anything,something,much,little,none等不定代词，引导定语从句用that。to go shopping作表语。森林参与生物圈水循环的两项主要生理作用是A.蒸腾作用、光合作用B.从土壤中吸收水分、蒸腾作用C.光合作用、呼吸作用D.呼吸作用、蒸腾作用