—Hey, what just happened to my computer? It suddenly froze and then came back on again!
—Oh, it seems that the computer has been a______ by the “Blaster”virus!
The 911 rescue team found the missing boy extremely f______， the wolves howling in the woods.
—Do you really believe there is human race in outer space?
—So far there is no proof that people from other planets do e______.
We couldn't cut the string because the edge of the knife was not s______ enough.
Even though he has lived in China for many years, Mark still can not a______himself to the Chinese customs.