27. (单选题) It is desirable that the airplane ___________ as light as possible.(本题2.5分)
A、 is
B、 were
C、 be
D、 had been
出自：陇东学院-大学英语1(专升本)

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10245403】个 (题库试题定时更新)