白血病脾大的机制是（）

A.瘤细胞增生

B.肿瘤细胞浸润、脾代偿性增生

C.炎症细胞浸润、纤维组织增生

D.脾充血性肿大

E.细胞浸润及纤维组织增生

________ you’ve got two film tickets, you may as well invite Mary to go with you tonight.

A Now that         B After all        C Although      D As soon as