I think we should give him another chance _______ he has made some mistakes.

A．though

B．unless

C．if

D．until

传染性单核细胞增多症可见（）

A.周围血中幼稚细胞、原始细胞>0.15

B.周围血有较多幼稚粒细胞伴嗜酸、嗜碱性粒细胞增多

C.周围血中幼红、幼粒细胞易见，骨髓呈现"干抽"

D.周围血中出现较多异形淋巴细胞

E.周围血中易见盔形细胞、小球形细胞及破碎红细胞