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The chair looks rather hard, but in fact, it is very comfortable to _______.

A. sit　　　　　　　　　　　　　　　　   B. sit on　　　　　　    C. be sat　　　　　　    D. be sat on

A. sit　　　　　　　　　　　　　　　　   B. sit on　　　　　　    C. be sat　　　　　　    D. be sat on

 The chair looks rather hard, but in fact it is very comfortable to _______.

A. sitting   B. sit on     C. sit D. being sat on

The chair looks rather hard, but in fact, it is very comfortable to _____.

　 A. sit 　 B. sit on

　 C. be sat 　 D. be sat on