—— I can’t get through to the general manager’s office anyhow. —— The line is busy. Someone_____the telephone. 
#89932
A
must use
B
uses
C
must have been using
D
must be using
推荐题目
He hesitated for a moment before kicking the ball, otherwise he      a goal.   
#86634
A
had scored
B
scored
C
would score
D
would have scored
 Never _______ forget the days when _______  together with you.
#89468
A
shall I;I lived
B
shall I;did I live
C
I shall;I lived
D
I shall;did I live
The doctor recommended he ____ a few more days in hospital.
#87012
A
stays
B
to stay
C
stay
D
would stay