施工图纸供应不及时、不配套影响施工进度属于（）。

A.业主因素

B.勘察设计因素

C.施工技术因素

D.资金因素

---_________ ?

---I’m not sure, but he might have been ill in bed.

A．What do you think has happened to Tom

B．What do you think Tom has happened

C．Do you think what has happened to Tom

D．Do you think what Tom has happened