2017北京)______ birds use their feathers for flight，some of their feathers are for other purposes.
（A）0nce
（B） If
（C） Although
（D） Because
查看解析
参考答案
继续答题：下一题
更多高中英语试题
- 1Some pictures of the river brought the days back to the old people ______ they swam in it.
- 2When I arrived，Bryan took me to see the house ______ I would be staying.
- 3A company _________ profits from home markets are declining may seek opportunities abroad.
- 4Mike was usually so careful _______ this time he made a small mistake.
- 5The limits of a persons intelligence，generally speaking，are fixed at birth，but _______ he reaches these limits will depend on his environment.
- 6The meaning of the word "nice" changed a few times _______ it finally came to include the sense " pleasant".
