For the sake of enough time for study and rest, students are _____ from using cellphones in our school.
—Shall I call you at 10 tomorrow morning?—Better not. I ______ a lecture to some university students. Just send me a message.
According to some students, ______ listening practice is still ______ must in Senior 3, because it helps promote the sense of language.
It is important to know about the cultural differences that cause problems.
If we earlier, we couldn’t be waiting here in a queue.
Our country should set up more national parks animals can live freely.