The leave on the trees ____ yellow in autumn.A are turningB are turnedC turning选择并说明理由.

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The leave on the trees ____ yellow in autumn.A are turningB are turnedC turning选择并说明理由.
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The leave on the trees ____ yellow in autumn.A are turningB are turnedC turning选择并说明理由.
The leave on the trees ____ yellow in autumn.
A are turning
B are turned
C turning
选择并说明理由.

The leave on the trees ____ yellow in autumn.A are turningB are turnedC turning选择并说明理由.
A
用的是现在进行时.
B是错误的,因为are 后面应加动词的ing,而不是过去式
C更是错,turning只有在like(或还有其他的)动词后面才可加ing,或者加上be动词

a