选一选。(6分)“ The boy is a lucky dog.”中的“dog”在这里是什么意思?________
()I’m going to her. A. help B. helping C. helpful
()And this little boy will . A. cry B. crying C. to cry
() The little boy can’t his science. A. do B. does C. doing
()I am . A. help B. helpful C. go
()He very naughty. A. are B.\ C. is