Hehave been here two hours ago but he hasn’tby now.A. might; turned toB. should; turned u

问题补充：

Hehave been here two hours ago, but he hasn’tby now.

A. might; turned to

B. should; turned up

C. could; turned in

D. must; turned on

答案：

A. might; turned to

(答案→)B. should; turned up

C. could; turned in

D. must; turned on

解析：should have done 本应该做某事，而实际上没有做，turn up出现，句意：他两个小时本应该出现的，但是他现在还没有出现。所以选B。