my model plane is broken. i donot know_____ a.what to do b.how to do

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my model plane is broken. i donot know_____ a.what to do b.how to do
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my model plane is broken. i donot know_____ a.what to do b.how to do
my model plane is broken. i donot know_____ a.what to do b.how to do

my model plane is broken. i donot know_____ a.what to do b.how to do
my model plane is broken.i donot know_____ a.what to do b.how to do
答案:A
what to do 做某事,how to do it 怎样做

答案:A
怎么办
B
How to do it

B how

A what waht to do how to do it what 做do的宾语 如果填how应该是how to do后面加宾语 A what to do 是动词不定时与特殊疑问词连用一