The role of the architect, though changing, _____ been central to the successful and sometimes less than successful design and implementation of pleasingly built environments in which people live.
A. has
B. have

Random Topics:
Adverbs by TypeFirst ConditionalsDefinite and Zero ArticleSimple TensesAdjectivePerfect ModalsGrammar - Present and Past PassivePronouns and AdverbsComparison and ModalsAdjective & AdverbsOther quiz:
Grammar - Quantiflier › ViewHow ——- do you pay for the entrance fee?
A. any
B. much
C. little
D. many
Present Simple Passive › View
Carlos and Juan play the piano.
A. The piano was play by them.
B. The piano is played by them.
C. The piano is play by them.
D. The piano played by them.
Grammar › ViewChoose the correct option. They ________ to the concert last night.
A. didn’t go
B. don’t go
C. doesn’t go
Time Clauses of Future › View
First, I will talk to the director. Then, I will take a decision.
A. I won’t take a decision until I talk to the director.
B. I won’t take a decision untill I talk to the director.
C. I won’t take a decision until I will talk to the director.
