2 . A number of _________ took ___________ in the project.
大量的科学家参加了这个项日。

3 . Plan your time well, and you can spend more time ________ (take) part in activities you like.

7 . 从方框中选择恰当的词或短语并用其正确的形式填空（每个词或短语只能用一次）。

break down; put in; in a hurry; do the dishes; develop; bad; take part in; cut down; give up; come true

1. Work hard, and your dream ______ some day.
2. Qian Xuesen did a great deal for the ______ of China’s space technology.
3. Keeping worries to yourself will make them even ______.
4. Judy is active. She ______ different activities since 2020.
5. Look! Simon ______ a new light in the living room.
6. My car ______ because of the heavy snow. Then I took a taxi to work.
7. Wild animals will have nowhere to live if more trees ______.
8. My father is advised ______ smoking as it’s bad for his health.
9. Mary ______ in the kitchen at 6 p.m. yesterday.
10. When the earthquake happened, Mike was afraid and ran outside ______.