Mr． Black thinks it's important for children to help ______ parents to do some chores．（ ）
A．theirB．themC．they
Many modern trains in the world_____in Zhuzhou．（ ）
A．are creatingB．created
C．are created
Polly has been ill for three days but she is a lot_____today．（ ）
A．bestB．betterC．good
People remember the first traveler from England____came to live in America．（ ）
A．whichB．whereC．who
He likes watching the fifth channel．_____channel is about sports．（ ）
A．AnB．TheC．A
We are not allowed to laugh when we_____．（ ）
A．ateB．have eatenC．are eating