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(单选题)My computer had a ______ system because it ceased to functio (单选题)This new type of machine is said to be expensive but effecti (单选题)Jenny depicted Paris as a romantic and spectacular place, as (单选题)—What do you think of the bike you bought yesterday?—At leas (单选题)Its website says the center is a living history museum _____ (单选题)So far economic and technological changes ______ shifts in t (单选题)Fifty days ______ like a long period for me to wait for the (单选题)Though he is always odd, we can’t ______ his accomplishments (单选题)People who live in the northern U.S. are more generous with (单选题)I still don’t understand why you chose to become an astronau