The application of AI in healthcare is expected to cut ____the cost of treatments and care.
A. out
B. into
C. down
D. through
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While ____the article,I was wondering whether e-books would replace print books soon.
A. reading
B. read
C. was reading
D. ro read
It was not until the 1990s ____industrial robots became really cheap, and therefore a possible option.
A. which
B. who
C. whom
D. that
This research investigated the promblem of pollution____by vehicles in the city of Tripoli,Libya.
A. be cause
B. caused
C. to cause
D. in cause
When you meet John this afternoon,don't forget____
A. tell
B. telling
C. to tell
D. told