No matter （）hard I try，I can never catch up with him.

It is called solar cooker，a newly designed cooking device and there are many kinds of solar cookers （）.

A.convenient
B.available
C.useful

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----Oh，Mary’s not here these days.Is she ill？----（）.Her mother told me that she was in hospital.

A.I am afraid so
B.I hope not
C.I don’t mind
D.I don’t think so

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