It’s difficult for me to decide which one to choose, because ______ of them are good.
—he? — He’s my cousin.
name is Bob, is eleven years old.
_______, or you’ll fail the exam. A. Studying hard B. Study hard C. To study hard
People along the river didn’t allow them to ________ a factory so as not to pollute the water.
Helen is my friend. She is in ______ at Beijing No.11Middle School.