完成句子（每空限填一个词）（共10小题；每小题1分，满分10分）
每当我处于困境时，我的朋友们总是毫不犹豫地来帮助我。
Whenever I am in trouble, my friends always come to help me ______ ______.
他进来时，所有人的视线都集中在他身上，使得他很尴尬。
All eyes were _______ _______ him when he came in, which made him embarrassed.
我们必须降低成本，这样才能将我们产品的价格下调。
We must ____ ____ on the cost so that the price of our product can be brought down.
他看报纸很投入,没有注意到有什么人进入教室.
He was so absorbed ______ a newspaper ______he didn’t notice anyone enter the classroom.
有时候在与人相处时，我们需要有人指点。
Sometimes we need help to ______ ______ with others.
因为她不信守诺言，我们从此情断义绝。
We weren’t going to be friends any more because she couldn’t ______ her ______.
他的零钱已经用光了。
His pocket money has been ______ ______.
与1800年相比，世界人口已经增长了六倍。
The world’s population has grown by six times what______ ______ in 1800.
这所学校每年招收200名学生。
200 students ______ ______ to the school every year.
除非必要，你最好不要查字典。
_______ _______, you’d better not refer to the dictionary.