来自郭巍的问题
Youshouldmake__________yourhouseorflatissecure.选项:a、sureb、certainc、understandingd、knowledge
Youshouldmake__________yourhouseorflatissecure.
选项:
a、sure
b、certain
c、understanding
d、knowledge


Youshouldmake__________yourhouseorflatissecure.选项:a、sureb、certainc、understandingd、knowledge
Youshouldmake__________yourhouseorflatissecure.
选项:
a、sure
b、certain
c、understanding
d、knowledge
A
makesure(that)+从句,确保...