阅读理解。
After Mr and Mrs Smith spent a happy morning at the zoo with Joe,their four-year-old grandson they stopped at the restaurant and then went into it for lunch.When the waiter passed them some menus, Mr
Smith reached into his pocket for his glasses. He was disappointed(失望的)to find that they were lost.“I
know where your glasses are, Grandpa ,"said the grandson.
"Where?"asked Mr Smith happily.
"They are at the zoo. ”Joe answered. “When you took me off the train near the elephants,they fell out
of your pocket. ”
Mr Smith was a little angry and he asked,"Joe,if you saw my glasses fall out of my shirt,why didn't
you tell me?”
"Well,Grandpa,"said Joe,"after you put your foot on them,I didn't think you wanted them any
more.
1. Where did they stay the whole morning?
A. A restaurant.
B. At the zoo.
C. Their home.
D. The station.
2. Which one is TRUE according to the passage?
A. Joe is the son of Mr and Mrs Smith.
B. They had their lunch at home.
C. Mr Smith found his glasses at last.
D. Mr Smith's glasses were broken.
3. Where was Mr Smith’s glasses?
A. At the restaurant.
B. 0n the way to the restaurant.
C. At the zoo.
D. In Mr Smith’s pocket.
4. What happened to Mr Smith's glasses at last?
A. Stolen by the thief.
B. Broken by Joe.
C. Lost at the zoo.
D. Stepped by Mr Smith.
5. What do you think of Joe?
A. Clever
B. Naughty.
C. Silly.
D. Lovely.
Na2CO3＋ H2O ＋ CO2↑。其中，NaHCO3属于 （“酸”、“碱”或“盐”），反应②属于 反应，Na2CO3的俗名叫 。