自乌克兰危机爆发以来,俄美关系持续紧张,俄罗斯指责美国利用乌克兰问题对俄实施孤立政策,美国则指责俄罗斯干涉乌克兰内政,并同其他西方国家一道对俄实施制裁。这表明( )①国家利益是国际关系的决定性因素②美国是维护国际和平与稳定的坚定力量③竞争、合作与冲突依旧是国际关系的基本形式④军事关系是国际关系的最主要内容
My father bought the i-phone 5S two weeks ago. He ______ it since two weeks ago.
Today I will meet my best friend. We__________ each other since I left school.
Now, __________college students want to work as a teacher in our city.
I can’t get __________ the door because there are too many people standing there.
__________it is to go camping ___________ fine day.