The project is based on an agreement, one of _____ purposes is to ensure that the project can be completed before the deadline.
John as well as his good friends often skating in winter.
Liu Ming is said abroad for one year before he came to teach in our school.
The boy lost his key, so he has no choice but till his mother came home.
Nick is looking for another job because he feels that nothing he does ________ his boss.
--Mary, I think you had better say sorry to John. --.It was his fault, NOT mine!