Choose and write.(选用合适的单词填空。)
than , older,higher,longer
1. Amy's younger______________________Lingling.
2. Daming is eleven years old. Li Ping is ten years old Daming is________________than Li Ping.
3. The Changjiang River is___________________thanthe Yellow River.
4. Mount Qomolangma is ___________________ than the Mount Tai.