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dario: you can borrow my lighter instead.
brian: no thanks, i prefer to use matches.
dario: matches are not good for the environment though.
brian: why do you say that?
dario: to make matches you need to cut down a lot of trees!
brian: oh, i see your point. i will start buying lighters in the future.
¡¾Àý¡¿Water pipes often burst in cold weather. Ë®¹ÜÔÚº®ÀäµÄÌìÆøÀï¾³£¶³ÁÑ¡£
¡¾Àý¡¿The Ancient Greeks used lenses to concentrate the sun's rays on dry leaves to light fire. ¹ÅÏ£À°ÈËÓÃ͸¾µ½«Ì«Ñô¹â¾Û¼¯ÔÚ¸ÉÊ÷Ò¶ÉÏÈ¡»ð¡£
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¡¾Àý¡¿The museum drew on its archive colllection for its exhibition. ²©Îï¹ÝΪÁËÕ¹ÀÀʹÓÃÁËÊղصĵµ°¸¡£
Leisure spending constituted a larger percentage (around 20%) of student expenditure in both country A and country B, while in country C more money was spent on books (21 %) than on leisure (12%).
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¡¾Àý¡¿What brand of cola do you like? Äãϲ»¶ºÈÊ²Ã´ÅÆ×ӵĿÉÀÖ£¿
¡¾Àý¡¿Film provides an ideal opportunity to acquaint viewers with something unknown. µçÓ°¸ø¹ÛÖÚÌṩÁËÒ»¸öÁ˽âδ֪ÊÂÎïµÄ¾ø¼Ñ»ú»á¡£
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¡¾Àý¡¿Nothing can compensate for the loss of one's health. Ò»¸öÈËʧȥÁ˽¡¿µÊÇʲô¶¼ÃÖ²¹²»Á˵ġ£
Keys:
1. We have to do it ourselves.
2. Does Mary have to study hard at English?
3. He had to get up early last Sunday.
4. You don¡¯t have to worry about your lessons.
5. Peter was very tired and he had to sit down and have a rest.
j) Homework
1. Read the dialogue and try to make a new one.
2. Make sentences using ¡°have to¡±.
3. Do exercises on page 79.
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