1．(2018·全国卷Ⅰ)To figure ________ how much power these devices are using, Callie Babbitt and her colleagues tracked the environmental costs for each product.
[答案] out
2．(2018·天津卷)I saw some ________(sculpture) in one room.
[答案] sculptures
3．He had no offspring throughout his life, but fortunately, he had an ________(adopt) son.
[答案] adopted
4．I have tried to keep my translation as ________(faith) as possible to the original book.
[答案] faithful
