Tom always goes home_____ his bike. [ ]

It’s very kind _____ you to help me carry the boxes since it is difficult ______ a person like you to carry so heavy things. [ ]

Two ______ trees have been planted along the lake since 1998.

My little brother was born _______ a rainy day _______ summer, and our family name is exactly “Xia”. So we call him “Xia Yu”. [ ]

Where is my watch? I _______ find it. —-Don’t worry. It must be somewhere in your room.