Perseveranceisakindofqualityandthatis_______ittakestodoanythingwell.
A、whatA
what 在表语从句中作 takes 的宾语 ,构成 "It takes sth. to do sth." 的句型。答案为 A。
CollinsCOBUILDEnglishLanguageDictionary(1987)hassomeuniquefeaturessuchasdefinition,extracolumnand______.
—Davidhasmadegreatprogressrecently.—_______，and_______.
Fromtheviewpointofwordformation,theword“smog”isa______.
Thereisanambiguityinthesentence“Heisahardbusinessman”dueto______.
Amongthefollowingwords,“______”doesNOThaveinflectionalaffixes.
