We haven’t decided _______ we’ll go to Shanghai next week.
—Which subject do you like more, Allen?—I like music class more because it is ______.
Tree Planting Day is on ______ of March.
—Are you taller than your cousin, Mike? —No, I am as ______ as him.
It’s hot today, ______we want to go swimming in the river.
—______ do they get a present for their mother?—Because it’s their mother’s birthday.