My daughter is reallyQQ these days;she spends hours on it every day.A. upB. intoC. ontoD.

问题补充：

My daughter is reallyQQ these days;she spends hours on it every day.

A. up

B. into

C. onto

D. with

答案：

A. up

(答案→)B. into

C. onto

D. with

解析：考查介词的用法。此处be into表示“对……深感兴趣，深深迷上……”。