David is good at____________model planes (make)还有一个canyou tell me how____________the fax machine (use)

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David is good at____________model planes (make)还有一个canyou tell me how____________the fax machine (use)
David is good at____________model planes (make)
还有一个
canyou tell me how____________the fax machine (use)

David is good at____________model planes (make)还有一个canyou tell me how____________the fax machine (use)
making
to use

making
to use

1.at是介词,后面需跟名词、代词的宾格,如遇到动词,要将动词变为动名词,也就是在动词后加上ing。所以第一个填 making.
2.这个题只需记住以下句型就能解决很多此方面的问题:tell sb. how \ what \ when \ where to do sth.所以这里填 to use。