Question

the students must be

The students must be careful at the c--------------- The old peopleshould be crefully to c--------
the road.根据句意及首字母提示补全单词.

Answer 1

The students must be careful at the crossing.
学生们必须在十字路口处小心.(at+地点,地点是名词,crossing是人行横道,十字路口）
The old people should be carefully to cross the road.
老人们必须小心地过马路.（to+动词构成不定式）