_______, they didn’t do well in helping each other with their study.
A. To honest B. Honest C. To be honest D. To be honestly
_______, they didn’t do well in helping each other with their study.
A. To honest B. Honest C. To be honest D. To be honestlyC.
解析：to be honest是固定搭配，意为“说实话，老实说”，作状语，还可使用副词honestly。to honest和to be honestly错误搭配，Honest是形容词，不能作状语。