— Did you borrow the comic book from the library?
— Yes. I ________ it for three days. I’ll return it this afternoon.
| A．borrowed | B．had kept |
| C．have borrowed | D．have kept |
Pick up your pen and draw your own invention．Maybe it will be_____a real product one day!（ ）
A．turned onB．turned down
C．turned offD．turned into
Sweet wormwood （青蒿）is a common plant in China．Tu Youyou is the woman______used the plant's special power to save millions of lives．（ ）
A．whichB．whoC．whoseD．/
These people dress themselves in bloody shark suits．They tell people______shark fins in order to protect sharks．（ ）
A．eatB．to eatC．not eatD．not to eat
_____do you have dinner with your family at restaurants？
Hardly ever．（ ）
A．How oftenB．How longC．How manyD．How much
"I want to go to Mars （火星），because it's a place that no one______to before，"said Carson．（ ）
A．has goneB．has beenC．wasD．went