今天小华做了5道语文题，6道数学题，还有7道英语题，小华今天一共做了18道题．

A: Is this bed soft?

B: Yes, ____.

阅读理解

B

    "I'm trying to do extra chores so I can make enough money to buy the new Space Invaders video game, but there's nothing to do," Michael sighed.

    "You could offer to wash Mom and Dad's cars," Greg said. “Some neighbors would pay you to wash theirs, too." Michael nodded. The air was cold. He shivered(颤抖) at the thought of washing cars and getting wet in this cold weather. "Maybe this isn't a good idea."

    "I have some golf gloves that are designed for wet and cold weather. You can wear them, and I'll even help you wash the cars," Greg said.

    "Really? You would help me and let me keep the money?"

    "Sure. Golf season is over. I won't need the extra cash for a while."  Greg disappeared inside the house. And soon, Greg came back with the gloves.

    Michael asked his parents if he could wash their cars for a small fee. When they agreed, he asked some neighbors, too. Three more agreed. After washing the cars, Michael got enough money for that video game.

    Greg drove Michael to the mall. Michael found the game immediately, but as he took it off the shelf, he saw a golf video game next to it. Michael looked at Greg and thought of how he had helped him. Greg loved golf and wouldn’t play golf again until spring, unless… Michael put his game back and brought the golf game to the register.

小明在玻璃杯内盛满水，杯口盖上一张硬纸片(不留空气)，然后托住纸片，将杯子倒置或倾斜，水都不流出，纸片也不掉下(如图所示)。对整个探究活动的分析正确的是（   ）