He is working very hard now because his career is at a(n)______ turning point.
A. effective
B. insignificant
C. academic
D. Crucial
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My teacher told me that storing customer details in computer made them readily (access)____.
With the rapid development of the market, we must(constant)____adapt and innovate to ensure success in it.
He is (know)____as a strict teacher who is feared by his students.
It was rude of you not to (social)____with the people at the party.