Sindy, ________ to be here at 8 o’clock A is sure B is sure that C will be sure D be sure

题目

Sindy, ________ to be here at 8 o’clock A is sure B is sure that C will be sure D be sure
________ when you cross the road.
A Do care B Care C Do be careful D To be careful
这两题选什么?解释一下道理.急.谢谢

答案