我们公司承诺提供最好的产品和服务。make a commitment toOur company has________________________ the best products and service.

-Where is your father?-He ________ Australia and he ________ Sydney for two weeks. A: has been to;has been in B: has gone to;has been in C: has been in;has been to D: has gone to;has been to

10. With his hard work, John ____ the basic knowledge of computer.A. has caught B. has acquired C. has required D. has acknowledged A: A. has caught B: B. has acquired C: C. has required D: D. has acknowledged

—Where are the twins? —One ________ flowers and trees in the garden, the other ______ to help her. A: has watered, has gone B: is watering, has been C: is watering, has gone D: has watered, has been

John has never been on time, ( )? A: as John B: has not John C: has he D: has not he

He ____never ____ a problem with his boss. A: has ...has B: has ...had C: has ...have D: had ...had

What has happened to Bob A: He has retired. B: He has fallen ill. C: He has gone for a business. D: He has been late for work.

His grandma ______ for 5 years. A: has dead B: has died C: has been dead D: has been died

Mr. Black ___ the party for one hour. A: has atteded B: has joined C: has been in D: has taken part in

2. Anyone ________ the website. A: has an access to B: has access to C: has access for