The Smiths consider _____ a computer, which is commonly considered _____ a great help in their work and study.
I'm told that languagepractising.com is a free website ________ learners can not just learn various languages but also chat online.
As a single mother of three children, she has very little time ________ she can spare to develop her own interest.
The band was very successful in the seventies, most of ________ members were in their twenties.
—Where did you come across our Chinese teacher?—It was in the supermarket ________ I purchased mooncakes.
The course about Chinese food attracts over 100 students per year, ________ up to half are from overseas.