[单项选择]Why couldn’t Todd and June find out who sent them the tickets [A] Their friends wanted to keep it a secret. [B] The letter with the tickets was not signed. [C] There was no letter with the tickets.

[多项选择]The reason why I sent them a fax was to give them the information at once.
In order to ______

[单项选择]Who had sent them the tickets [A] The people who stole their paintings. [B] Their best friends. [C] The actors in the play.

[单项选择]Let’s try to find out why getting fiber from whole foods is important for a healthy diet. Fiber has never been (67) you’d call a healthy nutrient. Suddenly, it’s a superstar: Manufacturers are (68) it to yogurt, juice, even (69) sweetener.
But as with many (70) , there’s an unseemly back story: Experts aren’t sure that these fiber-boosted foods are (71) trying.
Yes, you should eat lots of fiber. There’s no question that a diet (72) in high-fiber foods is a powerful lifesaver-it’s known to (73) the risk of heart disease and diabetes, and it helps (74) weight gain. Recent studies show a fiber-rich cuts the risk of breast cancer, too, and the (75) you’ll develop cancer of the small intestine. But the new foods might not (76) That’s (77) many of them use "isolated" fiber-stuff that’s been (78) out of the foods that (79) contained it
A. foods
B. vegetables
C. riches
D. celebrities