[ Grammar ]
__________ earliest successful AI program was written in 1951 by Christopher Strachey, later director of the Programming Research Group at the University of Oxford.
A. A
B. An
C. The
D. That

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Homonyms › ViewThe teacher called the ___ at the beginning of each class.
a. role
b. roll
Articles › View
___ Eiffel Tower is ___ famous landmark in Paris.
A. The, a
B. A, the
C. (no article), a
D. The, the
Grammar › ViewMarcus said he…………………………(try) to find a flat for ages before he finally found one he liked.
A. tried
B. was trying
C. had been trying
D. has been trying
Tenses › View
Tim was tired. He _______ hard all day.
A. has been studying
B. studies
C. studied
D. had been studying
