单项选择题The head of the executive branch in New Zealand is______.
单项选择题It is reported that the police will soon ______ the case of two missing children.
单项选择题() Yellow River is the second longest river in our country.
A. / B. The C. An D. A
单项选择题小学英语课堂唱英语歌,应要求______。
单项选择题班集体形成的条件和前进的动力是______。