1.Thereishardlyanenvironmentonearth________somespeciesofanimalorotherhasnotadaptedsuccessfully.
2.Somemetalsarebetterconductorsofelectricitythanothers________meansthattheformerhaveatomthatcontainmorefreeelectronthanthelatter.
3.Agoodfriendisonewhowill________youwhenyouareintrouble.
4.Thespeaker________hisnotesbeforethelecture.
5.Ifindthistreatmentvery________tomyhealth.
6.Don’thavehimforafriend.He’s________acriminal.
7.Mostdoctorsrecognizethatmedicineis________.
A)anartasmuchitisascience
B)asmuchanartasitisascience
C)asanartasmuchitisscience
D)muchanartasitisascience(B)
8.Asa________president,hisviewsaretreatedwithrespectwhenheisinterviewed.
9.Itishighlydesirablethatanewpresident________forthiscollege.
10.ThesupplyofelectricpowertoMadridandneighboringdistrictshashadtobe________.