Tom _____sure to be here on time tomorrow .A is B be C will D is going to be

问题描述:

Tom _____sure to be here on time tomorrow .
A is B be C will D is going to be

A

be 强调句。用原型

因为根据语境是tom肯定明天会准时到.
“肯定”这种事应该是现在肯定的,哪有将要肯定的,所以不用将来时.