Mary has_______finished the difficult work.what about his classmater?_____---Mary has_______finished the difficult work.what about his classmater?--- _____.A.already; Not still.B.already; Not yet.

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Mary has_______finished the difficult work.what about his classmater?_____---Mary has_______finished the difficult work.what about his classmater?--- _____.A.already; Not still.B.already; Not yet.

Mary has_______finished the difficult work.what about his classmater?_____---Mary has_______finished the difficult work.what about his classmater?--- _____.A.already; Not still.B.already; Not yet.
Mary has_______finished the difficult work.what about his classmater?_____
---Mary has_______finished the difficult work.what about his classmater?
--- _____.
A.already; Not still.B.already; Not yet.

Mary has_______finished the difficult work.what about his classmater?_____---Mary has_______finished the difficult work.what about his classmater?--- _____.A.already; Not still.B.already; Not yet.
选B.
1,already是已经的意思,一般放在句首.
2,yet 是还没有的意思,一般放在否定句的句末.

B 一般完成时否定都用Not yet 没有Not still这种用法

百分百选A