10.Science gives us a new .
1.halted 军官命令部队停止前进，休息一下。
2.highlights 小组讨论文化交流时，突出民间关系的交流经验。
3.harness 人类极力利用取之不尽的太阳能。
4.harmony 我的猫和狗相处得十分和睦。
5.humble 这位医生虽然治好了许多人的病，但对他的工作仍很谦逊。
6.harsh 他将受到严厉的惩罚，因为他违反学校纪律的次数太多了。
7.hazard攀岩者有时冒着生命危险。
8.heaved 风暴在海面上掀起万丈波涛。
9.hedge 购买房子是防止通货膨胀的最佳保障。
10.horizon 科学使我们大开眼界。
II.Complete each sentence with one of four choices given below：
1.It is not easy to learn English well but if you ，you will succeed in the end.
A)hang up B)hang about
C)hang on D)hang onto
2.San Francisco is usually cool in the summer，but Los Angeles .
A)is rarely B)rarely is
C)is hardly D)is scarcely
3.We had to a lot of noise when the children were at home.
A)go in for B)hold on to
C)put up with D)keep pace with
4.Small farms and lack of modern technology have agricultural production.
A)blundered B)tangled
C)bewildered D)hampered
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