cording to the regulation, you canonly borrow a_______of ten books from the library

We _______-word from him so far.Where could he be

For teenagers，there are always too many rules that are expected________.[ ]

realizedthepolicehadspottedhim,theman_______theexitasquicklyaspossible.

Are you willing to study abroad one day — It sounds attractive, but it still worries me.