We regret to ________ that it may not be possible to deal with every request.
D
暂无解析
Others argue that since the earth has endured a long string of ice ages in the last two millionto three million years, any warming is ________ to be temporary.
________ to the papers is restricted to Defense Department personnel only.
________, John has been to several foreign countries.
Constructionoftherailwayshelpedtodevelopthenational_______ofTanzaniaandZambia.
Idon'tknowhowwecanmake________onthetimetableforanymorecourses.