This pattern of woods and fields is ______ of the English landscape.
A. complex
B. typical
C. accessible
D. indispensable
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The remote desert area is ______ only by helicopter.
A. accessible
B. accessory
C. excessive
D. successive
The researchers are currently ______ the study participants' health and lifestyle to see which factors might influence age-related cognitive changes.
A. conducting
B. analyzing
C. interacting
D. concerned
It was difficult to ______ how many people had been wounded in the earthquake.
A. budget
B. estimate
C. regulate
D. respond
Over the past years, China has made great ______ to creating an international environment of peace and stability for global economic and social development.
A. achievements
B. assignments
C. contributions
D. exceptions