单词填空
They usually buy drugs from ________（药贩子）.
句型转换
During the period between 1990 and 1999, he was studying English in England.
During ________ ________, he was studying English in England.
He became homeless because of the fire.
He became homeless ________ ________ ________ ________ the fire.
When Marx was more than 50, he found it important to study the situation in Russia.
When Marx was already ________ ________ ________, he found it
important to study the situation in Russia.
You will see him no more.
You will ________ see him ________ ________.
If you take this medicine, you'll be all right.
________ this medicine and you'll be all right.
Health care is free for everyone living in Britain.
Health care is free for everyone ________ ________ in Britain.
Once you ________ (see) him, you will never forget him.
Don't get off the bus until it ________ (stop).
The volleyball match ________ (put off) if it rains.