单项选择题

Nowadays, books are expensive. Every time I go to the bookstore, I seem ______ more.

A. to be spending
B. spending
C. to spending
D. spend
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单项选择题
I meant ______ you about it, but I forgot to do so.
A. telling
B. having told
C. to tell
D. to have told
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The ______ problem of bringing a space ship back from the moon has been solved.
A. technical
B. technological
C. technique
D. technology
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