2、ert.A.coveringB.coveredC.coverD.tocoverTheanswerisA.21.Theability________anideaisasimportantastheideaitself.A.expressingB.expressedC.toexpressD.tobeexpressed22.—Joan,what________inyourhand?—Look!It’s abirthdaygiftformygrandma.A.hadyouheldB.areyouholding C.