Question

They can't work out the maths problem．Can you tell them ________? [　　] A． how to do B． what to do it C． how to do it D． what should to do

Answer 1

答案：C
解析：

考查疑问词后接动词不定式。句意：他们不能算出这个数学题。你能告诉他们怎样做出它吗?what可作do的宾语’how不可作do的宾语，因此后需加代词it，因此选C。