Research during the past several decades on the nature of language

and the processes that produce and make it understandable has

revealed great complexity instead of underlying simplicity

A)that produce and make it understandable has revealed great

complexity instead of underlying simplicity

B)of producing and understanding it have revealed not underlying

simplicity but great complexity

C)by which it is produced and understood has revealed not

underlying simplicity but great complexity

D)by which it is produced and understood have revealed great

complexity rather than underlying simplicity

E) by which one produces and undertands it have revealed great

complexity instead of underlying simplicity

A is the given answer, 但是我人为理解不通, 首先, produce 是及物动词

, that produce,

Research during the past several decades on the nature of language

and the processes that produce and make it understandable has

revealed great complexity instead of underlying simplicity

A)that produce and make it understandable has revealed great

complexity instead of underlying simplicity

B)of producing and understanding it have revealed not underlying

simplicity but great complexity

C)by which it is produced and understood has revealed not

underlying simplicity but great complexity

D)by which it is produced and understood have revealed great

complexity rather than underlying simplicity

E) by which one produces and undertands it have revealed great

complexity instead of underlying simplicity

A is the given answer, 但是我人为理解不通,首先 produce 是及物动

词,that produce 是不正确的, 其次. make it understandable, it 是

Research or language ?

Research ...on the nature of language and the process.... HAS

revealed ...

是这样理解吗

这题争议很久了，很多大牛认为produce的谓语是it,和make共用谓语。it应该指带language,按照句子的逻辑意思。其实我也不是很清楚这题，可以去看以前的讨论。