A（n) ______ is a destructive program that fills a computer system with self－replicating in

The main idea of this passage is ______.A．in modern society people are under great work pr

We know from the passage that the author______.A．is still interested in journalism as a pr

This passage is a（n)______.A．noticeB．advertisementC．newsletterD．statement

It is said that ______ 2000 factories were closed down during the economic crisis.A、pr

When playing basketball he has a （n)_____ over others, for he is extremely tall.A.pr

Communication between a young couple is a（n) ____