This machine needs _____ once a year in order to work properly.A、to checkB、checkingC、checkD、checked

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This machine needs _____ once a year in order to work properly.A、to checkB、checkingC、checkD、checked
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This machine needs _____ once a year in order to work properly.A、to checkB、checkingC、checkD、checked
This machine needs _____ once a year in order to work properly.
A、to check
B、checking
C、check
D、checked

This machine needs _____ once a year in order to work properly.A、to checkB、checkingC、checkD、checked
B

A
need to do sth. 需要做某事

原题：This machine needs _____ once a year in order to work properly.
首先明确need既可以做情态动词又可以做动词，做情态动词后直接加动词原形。做实义动词时后跟to+动词原形，这种用法是大多数。详见：http://baike.baidu.com/view/533816.html?wtp=tt
这里明显need后面加了...

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原题：This machine needs _____ once a year in order to work properly.
首先明确need既可以做情态动词又可以做动词，做情态动词后直接加动词原形。做实义动词时后跟to+动词原形，这种用法是大多数。详见：http://baike.baidu.com/view/533816.html?wtp=tt
这里明显need后面加了S，因此是使役动词用法，用to do sth。选A

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There is something wrong with this machine.It needs repairing.请问为什么要用”repairing” This machine needs _____ once a year in order to work properly.A、to checkB、checkingC、checkD、checked This machine is unavailable. 1.This shirt is .(对括号内容提问） _ _ _ this shirt?2.Howmuch is the book?(同义句转换)_ _ _ _ the book?3.Tim needs a pair of sports shoes.(同义句转换）Tim needs _ _ a pair of sports shoes.4.Can I help you?(同义句转换)_ _ I _ f This plant needs( )water This friengship needs some This firendship needs some This firendship needs some work This kind of machine can p_______ music. This machine is very easy to This machine is very easy to the machine has been recovered this I need to repair his computer=His computer needs _ _ _=His computer needs _ Machine Machine Machine This is a very expensive machine同义句转换This is( ) ( ) ( ）machine This room needs to clean.用法对么?