1.It’s hard to tell what the words stand for these days.
It’s hard to tell what the words indicate these days.
2.The team consists of 10 girls and 5 boys.
The team includes 10 girls and 5 boys
3.The abacus is an ancient invention.
The abacus was invented in ancient time.
4.The Indians invented the system of numbers.
The system of numbers was invented by the Indians.
5.Most of my answers are accurate.
Most of my answers are right.
按要求完成下列各句
1.Mr Hill owned three restaurants in Shenzhen.對(duì)劃線部分提問（three）
How many restaurants did Mr Hill own in Shenzhen?
2.The invention of the zero helped people calculate more easily.對(duì)劃線部分提問（calculate more easily）
How did the invention of the zero help people?
3.People wrote numbers in many different ways.對(duì)劃線部分提問( in many different ways)
How did people write numbers?
4.You mustn't eat in the reading room.(改為祈使句）
Don't eat in the reading room.
5.people,easier,for,work,machines,it,to,make(.) (連詞成句）
Machines make it easier for people to work.