---Have you heard of Earth Day? --- Yes, We have only one Earth. We have no cho
题型：不详难度：来源：
---Have you heard of Earth Day?
--- Yes, We have only one Earth. We have no choice but ________ it.| A．protect | B．protected | C．protecting | D．to protect |
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答案
| D |
解析
试题分析: 句意：你听过地球日吗？听过，我们只有一个地球，我们除了保护它别无选择。Have后接带to不定式，故选D。 |
举一反三
Every day we spend half an hour morning exercise。| A．do | B． to do | C． for doing | D． doing |
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I saw them ___football on the playground when I passed by.| A．playing | B．were playing | C．played | D．to play |
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You must eat all kinds of fruits and vegetables a balanced diet.| A．have | B．to have | C．having | D．had |
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Are you still afraid __________?| A．to being alone | B．of being alone | C．of alone | D．to live lonely |
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Mum allowed me _____TV last evening.| A．watching | B．watched | C．watch | D．to watch |
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