There are so many viruses on the Internet. If __________ accidentally, the viruses may make your computer break down.
Mary thought highly of the painting, but to Mr. Smith’s _____ eye, the painting was terrible.
A quarrel _________, which made him ______ his family.
Having never met with such a _____ problem, he felt _____ and didn’t know how to solve it.
Our class _______ 55 students at that time.
She felt herself _______ by her friends.