The manager _______ the workers how to improve the program since 9 a.m. 
#102020
A
has told
B
is telling
C
has been telling
D
will have told
推荐题目
Look ,the apartment that is     there belongs to us.
#100113
A
built
B
build
C
being built
D
being build
The two boys_____ games on the computer for three hours, and they would continue till midnight 
#104829
A
were playing
B
had played
C
had been playing
D
has been chatting