1.He is the man called Bob.（改为定语从句）
He is the man ___ ___ ___ Bob.
2..乒乓球运动有一百多年的历史了.
The sport of ping-pong is ___ ___ ___ yaers old.
3.你知道网球运动是何时发明的吗?
Do you know when the sport of tennis___ ___?
4.-Excuse me.is the library open all day?
-___.only from 9a.m.to 4p.m.
A.sorry,I'm afraid not B.that's right C.yes,of course D.sorry,I'm not sure
5.was the machine invented by Tom?she wasn't sure.（合并为一句）
she wasn't sure ___ the machine ___ ___ ___ Tom.
6.what do people use the pen to do?（改为被动语态）
what __ the pen to do by people?