问题标题：
用括号内所给单词的适当形式填空1`______（work)foralongtimeinstrong,changeablelightmaycausesomebiedsofillnesses2`wecanproduceelectrby______(burn)waste3`iamverysorryfor______(make)somuchnoise4`______(pollute)isev
问题描述：
用括号内所给单词的适当形式填空
1`______（work)foralongtimeinstrong,changeablelightmaycausesomebiedsofillnesses
2`wecanproduceelectrby______(burn)waste
3`iamverysorryfor______(make)somuchnoise
4`______(pollute)iseverywhereinchinanow.
5`smokingmusthave______（effect)onourhealth
6`howlonghaveyou______(be)likethis
7`he______(notwrite)tohismotherforamonth
8`youmuststop______(make)somuchnoise.thebabyissleeping
9`ihavebeenlikethissinceyou______(leave)home
10`what______(make)thegrandma'schesthurt
10`
吉德志回答：
1.Working伴随状语
2.burning介词后用动名词
3.making介词后用动名词
4.pollution主语用名词
5.effected用musthavedone句型
6.been过去完成时
7.hasn'twritten过去完成时
8.making惯用搭配stopdoing表示中止正在发证的某事
9.haveleft过去完成时
10.made过去时
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