The ______ adventure changed my in a lot of ways, including ensuring my wanderlust is still running strong through me.
A. only
B. solo
C. one
D. an
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Today's business environment is changing rapidly and is ______ (competitive) than ever.
Any students who neglects his homework is ______ (likely) to pass the final examination.
It's reported that food ______ (produce) is not keeping up with population growth.
It has been a long time since I ______ her in Australia.