—Why did he _____two objects from the top of the tower at the same time?
—He wanted to see which traveled faster.
A.carry B.fall C.drop D.hang
---Can you open a gift______ after you receive it In England?
---Yes. We don’t have to wait.
A.main B.immediately C.nearly D.loudly
—Shall we tell Nancy about our plan?
—Better not ._____ her mouth is always swinging(摇摆) open like a door.
A.Although B.Because C.Unless D.When
Nowadays square dance has become one of exercises for the Chinese grandmas.
A.popular B.more popular
C.most popular D.the most popular
It's interesting to learn the _____ and customs of other countries.
A.manners B.value C.changes D.choices
阅读下面的短文,在空白处填入一个适当的词或填入括号中所给单词的正确形式。
We often have classes in the lab(实验室). There are many 1.(rule)in the lab. Don't eat or drink in the lab. Don't 2.(bring)food or drinks to the lab. There 3.(be)three reasons. First, the bowls and cups are very easy to break and the food or drinks will be out. They will make the lab dirty. 4.(two), there are many dangerous things in the lab. It isn't good 5. us if we eat them. If you put the food 6. drinks into your mouth in the lab, you may 7.(eat)some of dangerous things. Of course, it is always a good idea 8.(wash)your hands each time before you leave the lab. Third, food can attract(吸引)some mice(老鼠)and flies(苍蝇). So, if you want 9.(drink)or eat something, do it 10. the lab.
