It was________great shock to the world that two aero-planes crashed into ______World Trade Center in New York o September 11th, 2001.
In some western countries, ________ are called “public schools” are not owned by the public.
Most people in that area objected ________a golf playground there.
I asked her whether she had done all the work herself ________ whether she had had asked sb. for help.
—These boxes are too heavy for him to carry. —Here, I’ll give you a hand________them.
I was on the point of going to bed ________ Mr. Zhang rang me up.