I think is really difficult for me to memorize so many new words. A. it B. that C. This
We will have a picnic ________ it doesn’t rain tomorrow.
—________ are you leaving for Shanghai? —Next week.
After the football match, the students were very________ and tired.
The dog ran to the door when it ________ Mr. Morgan’s steps.
Since Peter isn’t here, may I leave a message for________?