We all know that __________ a foreign language requires time and effort (努力).

Students are ______for new knowledge to suit themselves to the future jobs in various fields_______ which they are unfamiliar.

She often helps the students _____ she thinks are not good at English

We have to hold the meeting in the small hall because the meeting room where we planned to hold the meeting _____.

I’ll go on a trip to Hainan during the winter holiday.—– It’s a good to be on holiday there in winter.