Studies have shown that humans working with machines are________ than a human or machine working alone.
A. more effective
B. most effective
C. effective
D. least effective
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The application of AI in healthcare is expected to cut _________ the cost of threaments and care.
A. out
B. into
C. down
D. through
Unlike many companies ________ service stops once the sale is made, our service begins once you buy or product.
A. what
B. whose
C. that
D. which
While _________the article, I was wondering whether e-books would replace pring books soon.
A. reading
B. read
C. was reading
D. to read
It was not until the 1990s _________industrial robuts becaome really cheap, and therefore a possible option.
A. which
B. who
C. whom
D. that