I'm sure he able to finish this I'm sure he ( ).able to finish this job.A.be B.is C.are D.can请问选哪个

I'm sure he able to finish this I'm sure he ( ).able to finish this job.A.be B.is C.are D.can请问选哪个
I'm sure he able to finish this
I'm sure he ( ).able to finish this job.
A.be B.is C.are D.can
请问选哪个

I'm sure he able to finish this I'm sure he ( ).able to finish this job.A.be B.is C.are D.can请问选哪个
B
意思：我敢肯定他有能力完成这项工作.