s soon as the principal ______ thenews on the bulletin, the students began gathering in the school garden.

The book_________first aid is of great help to me.[ ]

I live in a noisy neighborhood．It’s difficult at night．

I find it difficult _______ up Mount Tai.

The chickens will provide us _______ feathers, ______ we can make use for cleaning the table and benches valign=”top” style=”width:213.05pt;padding:0cm 5.4pt 0cm 5.4pt”