The house is dirty because it ________ since they moved out.
| A．doesn't clean | B．isn't cleaned |
| C．hasn't cleaned | D．hasn't been cleaned |
As a single mother of three children, she has very little time ________she can spare to develop her own interest.
| A．when | B．that |
| C．which | D．what |
The band was very successful in the seventies, most of ________ members were in their twenties.
| A．its | B．whose |
| C．whom | D．which |
—Where did you come across our Chinese teacher?
—It was in the supermarket ________ I purchased mooncakes.
| A．that | B．which |
| C．where | D．when |
The course about Chinese food attracts over 100 students per year, ________ up to half are from overseas.
| A．in which | B．for whom |
| C．with which | D．of whom |
The road construction is based on the agreement, one of ________ purposes is to ensure its completion on time.
| A．which | B．whose |
| C．that | D．what |