[ Passive Voice ]
The office ………… already …………
A. was / be clean
B. have / been cleaned
C. has / been cleaned
D. Is / clean

Random Topics:
Take or PutGerunds and InfitinitivesPresent Continuous, Present Perfect and Used toArticlesPerfect ModalsModals and InversionWill, Be going to, Present ContinuousGrammar - TOEICGrammarCommunicative GrammarOther quiz:
Conjunction › ViewCombine the following sentences using a conjunction: The cat is black. The dog is brown.
A. The cat is black, however, the dog is brown.
B. The cat is black and the dog is brown.
C. The cat is black or the dog is brown.
D. The cat is black but the dog is brown.
Phrasal Verb › View
develop
A. Work on
B. Work up
C. Work out