_________ for your timely help, we’d never have been able to get clear of the trouble.
A. Had it not B. Had it not been C. If it were D. If we had not been正确答案B
_________ for your timely help, we’d never have been able to get clear of the trouble.
A. Had it not B. Had it not been C. If it were D. If we had not been正确答案B
