1 . The researchers don’t know how to ________ (solution) the new problem. （所给词的适当形式填空）

2 . Through this kind of healthy discussion, you will learn when to _______ and when to ask your parents to relax their control. (做出让步) (根据汉语提示完成句子)

3 . Machines have learned how ________ (perform) a huge range of tasks.（所给词的适当形式填空）

4 . The high point of the story comes when Huck is faced with the decision of ________ to hand Jim over to some slave catchers. (用适当的词填空)

5 . In addition, there are famous artists who will perform ______________ to cut paper on the spot.

6 . We discussed how to ______ (促进) cooperation between the two countries. (根据汉语提示单词拼写)

8 . I’m at a loss _________ to do next. (用适当的词填空)

10 . 何时何地建造新的工厂还没有被决定。（汉译英）