1．(2018·全国卷Ⅱ)Diets have changed in China — and so too has its top crop. Since 2011, the country (grow) more corn than rice.
解析：has grown 由时间状语“Since 2011”可知，这里要用现在完成时。主语“the country”是第三人称单数，故谓语动词用has grown。
2．(2018·江苏高考改编)Hopefully in 2025 we will no longer be e-mailing each other, for we (develop) more convenient electronic communication tools by then.
解析：will have developed 句意：在2025年我们有希望不用再互相发电子邮件了，因为到那时我们将已经研制出更方便的电子交流工具了。根据句中的“in 2025”以及“by then”可知，空格处应用将来完成时。
3．(2017·全国卷Ⅲ)My dad thinks I should take the offer now.But at the moment, school (come) first.
解析：comes 由时间状语at the moment可知，这里是指现在发生的事情，因此用一般现在时。
