— Things in your room are all over the floor. Be sure tobefore the guests.— No problem.A.

问题补充：

— Things in your room are all over the floor. Be sure tobefore the guests.

— No problem.

A. tidy it up; arrive

B. tidy it up; reach

C. tidy up it; arrive

D. tidy up it; reach

答案：

(答案→)A. tidy it up; arrive

B. tidy it up; reach

C. tidy up it; arrive

D. tidy up it; reach

解析：句意：—你房间的东西都散落在地板上。在客人来到之前，应确保收拾整齐。— 没问题。tidy up整理，后面跟名词时，在up之前，之后均可，跟代词作宾语时，只能放在up之前，再有，arrive是不及物动词而reach是及物动词，故选A。

考点: 考查动词短语和动词词义辨析的用法。