Tom, you should be polite and let our grandpa get the car first.— OK. And I will open the door for him.

You should study _____ a test _____ reading the textbook. [ ]

Qinghai-Tibet Railway(青藏铁路) was completed last year. It is the __________ railway that connects Tibet with the other parts of China.

Our school has a sports meeting _______October l0th.[ ]

I was really too busy with my homework and I couldn’t help ____________ housework.