A.I often met my grandparents five years ago.
B.I last met my grandparents five years ago.
C.I have met my grandparents for five years.
D.I didn't meet my grandparents five years ago.

A.I often met my grandparents five years ago.
B.I last met my grandparents five years ago.
C.I have met my grandparents for five years.
D.I didn't meet my grandparents five years ago.

A.The boys denied my staying a bit longer.
B.The boys refused to let me stay a bit longer.
C.The boys didn't agree to let stay a bit longer.
D.The boys insisted on my staying a bit longer.

A.You should use your mobile phones during the test.
B.You may use your mobile phone during the test.
C.You mustn't use your mobile phones during the test.
D.You needn't use your mobile phones during the test.

A.who
B.which
C.when
D.what

A.who
B.which
C.when
D.what

A.Another
B.Very
C.All
D.Each

A.answer
B.process
C.example
D.study

A.wonder
B.picture
C.business
D.training

A.trade
B.exist
C.credit
D.target