The train ________ she was travelling was late.

[　　]

Is oxygen the only gas ________ helps fire burn?

[　　]

I'll tell you ________ he told me last week.

[　　]

His parents died when he was young. He ________ by his uncle.

[　　]

Look around when ________the street.

[　　]

Do you think him easy ________?

[　　]

At present, English is the main subject ________ here.

[　　]

--I'd like to buy an expensive computer.

--Well, we have several models ________

[　　]

The chair looks rather hard, but in fact it is very comfortable to________.

[　　]

The two weavers（织工）pretended ________ very hard, though they did nothing at the looms.

[　　]