It was not until he arrived at the office_____ realized he had forgotten the key.
A. and he B. when he C. that he D. he
. You can’t imagine _______ when they received those nice Christmas presents.
A. how they were excited B. how excited they were
C. how excited were they D. they were excited
. ____ of the land in my hometown ____ covered with trees and grass.
A. Two-fifths; is B. Two-fifth; are C. Two-fifth; is D. Two-fifths; are
. It is difficult for us to _________ a conversation with so much noise around us.
A. communicate with B. carry on C. set up D. bring up
I failed again in the examination and only then _____ how much time I had wasted.
A. I realized B. I had realized C. did I realize D. had I realized
She knows so much about England. She ________ there before.
A. must be B. must have been C. must live D. must have lived in
