Don’t worry. All the children will arrive at school on time tomorrow.A. are able toB. canC

问题补充：

Don’t worry. All the children will arrive at school on time tomorrow.

A. are able to

B. can

C. be able to

D. can be able to

答案：

A. are able to

B. can

(答案→)C. be able to

D. can be able to

解析：句意：别担心。明天孩子们都能够按时到达学校的。本句中表示将来的能力，will表示将来的助动词，后面直接跟动词原形即be，故选C。