The cliffs on which the houses are built are starting to______________ .
举一反三
- The houses are built close together.
- The houses ________ are to be built will be given to young workers.
- Most of the houses _______ this year. A: has built B: have built C: has been built D: have been built
- The houses that they built last year ____________ live in.
- All of those houses _______ in the past ten years． A: were built B: had been built C: have been built D: have built