Educationists across China are experimenting and________ new assessing systems appropriate to assess(评价) students’ performance in school.

Why not go to see a movie —- Because there isn’t_______, I hear.

Time goes by so fast . We must never miss thechance to show love for our parents and make them _____ how much they mean tous .

Mr. Smith let off upon me the speech he_______ to make all along.

We should tell hunters _______tigers.