Exploring ________ space is exciting, yet dangerous. There is _______need for both robots and humans for space exploration.
| A．the; a | B．a; the | C．/; a | D．/; / |
— I failed in the exam again. How I wish I__________ harder!
—Come on! You can do it if you try.
| A．have worked | B．had worked | C．worked | D．would work |
After drinking a cup of tea, the old man __________ his story.
| A．kept | B．continued | C．finished | D．lasted |
The two friends had a quarrel about money, but shortly __________ they shook hands and made up.
| A．eventually | B．afterwards | C．suddenly | D．backwards |
Thinking that her daughter was doing homework, the mother left the room, __________.
| A．quickly and gentle | B．quick and gentle |
| C．quickly and gently | D．quick and gently |
Fully __________ in looking after three children at home, she no longer has time to enjoy various activities in the club.
| A．attached | B．occupied | C．contributed | D．devoted |