Look! David is helping his mother _______ the room.

I’m _____ frightened _______I can’t say anything.

He arrived _______ London _______ a cold winter night. [ ]

It is well known that nature has provided Shangri-la(香格里拉) with endless natural treasures, making the land happy home for the local people．

She didn’t write _____.So she didn’t pass the test.