Aunt Wu came in and she was followed by her daughter.Aunt Wu came in, ___ ___ ___ ___.
It's very difficult to climb a s __________ cliff.
She stressed that point in __________ (尤其).
A red lamp is used as a danger __________(信号).
He has __________ (申请)a post in a company in America.
The swimming pool is __________(可利用的)only in summer. In winter, it's closed.