Only after Mary read her composition the second time_________ the spelling mistake.[ ]

Your house looks so beautiful! When did you buy it—I _________ since half a year ago.

When did the Greens come to China—They_____ China for seven years.

1—Excuse me. You shouldn’tsmoke here. Look at the sign “NO SMOKING HERE”.–Sorry, I ________ it just now.

You can’t become infected_______ HIV by swimming in a pool, or sitting in a bath