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:
Reflexive Pronouns › ViewWhat is the reflexive pronoun in this sentence?
Mom made a cake by herself.
A. mom
B. herself
C. cake
D. made
Verb Patterns › View
Thankfully I remembered …………… an umbrella. Otherwise I would be soaked.
A. taking
B. take
C. to take
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.
