Mr. Friend said he would try his best to help me, and he was ______ his word.

Nancy reminded me of what I should ________ have forgotten [ ]

With the nuclear crisis worsening in Iran, the world’s attention is fixed again onis called the Middle East．

Since its introduction, the Beidou navigation system（导航系统）has been to everyday life, from shared bikes to farming.

The UnitedNationsin 1945