Some plants can take in carbon dioxide we breathe out and give ______ oxygen to us.
| A．in case | B．in turn | C．in return | D．in addition |
It's said that ________ gains from house sales should pay the individual income tax.
| A．who | B．whose | C．which | D．whoever |
— Lucy, how are you getting on with your composition?
— I have rewritten it so many times that I wonder if I ________ it.
| A．finish | B．finished | C．have finished | D．will finish |
Is it that you often play computer games ________ worries your parents?
| A．why | B．that | C．which | D．what |
The bush fire ________ fierce heat and the villagers nearby had to flee.
| A．set up | B．sent away | C．gave off | D．made out |
Wang yapping is ______ second woman astronaut in China who reached _____ space.
| A．/; the | B．the; / | C．the; the | D．a; a |