It seems quite   to expect a student to master 3000 words within only 2 days.

 The loss of ability in the mother tongue is mainly caused by the         use of electronic devices and a lack of attention to culture.

 —How was your recent trip to England?—I’ve never had ______ one before.

 It may not be a great suggestion. But before ______one is put forward, we’ll make do with it.

—Goods imported from abroad are       those made in China. —Yes. Some of the goods made in our country are of high quality.