并列题名：Clifford's class trip Clifford's class trip 并列题名：Clifford takes a trip clifford's class trip 并列题名：Clifford grows up 并列题名：Clifford's best friend 并列题名：Clifford's first autumn 并列题名：Clifford keeps cool 并列题名：Clifford's Christmas 并列题名：Clifford's manners