1 . The next morning he hired a boat and set out _______ (find) the well-known painter. （所给词的适当形式填空）

2 . Chinese researchers hope to use the instruments onboard Chang’e-4 _______ (find) and study areas of the South Pole-Aitken basin.（所给词的适当形式填空）

3 . The local government doesn't have to sacrifice environmental protection ____________ economic growth.

A．to be promoted

B．being promoted

C．promoting

D．to promote

4 . On our way to the house, it was raining so hard that we couldn't help wondering how long it would take________ (get) there. (所给词的适当形式填空）

5 . ________ the convenience of digital payment, many senior citizens started to use smart phones.

A．To enjoy

B．Enjoying

C．To have enjoyed

D．Enjoy

6 . Modern methods of tracking polar bear populations have been employed only since the mid-1980s, and are expensive ______ (perform) consistently over a large area. （用单词适当形式填空）

7 . Another reason for corn's rise: The government encourages farmers to grow corn instead of rice _______ (improve) water quality. （所给词的适当形式填空）

8 . 【2018·北京】During the Mid-Autumn Festival, family members often gather together _________ a meal, admire the moon and enjoy moon cakes.

A．share	B．to share
C．having shared	D．shared

9 . You don’t have to run fast or for long ________ (see) the benefit. （所给词的适当形式填空）

10 . But some students didn't want ______ (wear) the uniform. （用单词适当形式填空）