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We should _________ （告知)you of the date of the delegation’s arrival．
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______ the importance of English, we should put more effort into it and try to learn
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Under no ______ should we seek temporary economic development at the expense of the enviro
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______ these objections, we can not ignore the advantages of learning through the Internet
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To prevent dental disease, we should take a range of______of Vitamin C per day.A．25-2,000
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Those of us who smoke should have______ lungs X-rayed regularly since we are all aware of
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We should see ourselves as part of nature rather than in __________ with it.
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