1．There is a ________ (明显) improvement in your spoken English.
2．Scientists are working to find a ________ (方法) of storing this type of power.
3．He ________ (决定) that he should become a doctor.
4．How long can the present business ________ (繁荣) last?
5．The ________ (多数) of his books are kept upstairs.
6．My mother suffered all kinds of ________ (艰难) throughout her life.
7．A large ________ (比例) of schoolbooks now have pictures.
8．The ________ (联邦制的) Republic of Germany was the official name of West Germany.
9．All ________ (飞行器) must fuel before a long flight.
10．The school has children from many different ________ (种族的) groups.
