By 16:30,        was almost closing time, nearly all the paintings had been sold.

The other day, my father drove his car at ___ I thought was a dangerous speed.

People should think about _____ they can have a positive influence on the planet.

Teach children ______ electrical appliances, cords, and switches are not toys.

With the nuclear crisis worsening in Iran, the world's attention is fixed again on  is called the Middle East．

Don't throw away the old books. Give them to ________ needs them．

The road is covered with snow. I can’t understand ______ they insist on going by motorbike.

Do you know ____Rome wasn’t built in a day means?

Scientists observe ___ making the most of our senses when we are young can keep us healthy later on in life.

The old lady’s hand shook frequently. She explained to her doctor _______this shaking had began half a year before, and ______, only because of this, she had to give up her job.

It is none of my business. It's up to you to decide     he bought yesterday is used for.

A Hope School will be built in_____ used to be a temple.

I just wonder ____ that makes him so excited. 

He  told ______ should  read.

After five hours’ drive, they reached____they thought was the place they had been dreaming.

Thinking________you know _________in fact you don’t is a terrible mistake.

I lived in         you call “ancient Greece” and I used to write about the Olympic Games a long time ago.

I’ll tell you _______ he told me last week.

After months of voyage, Columbus arrived in     later proved a new continent.

－Why did you talk to the teacher after class?－I didn’t understand______________ during the lecture.