It _____ about twenty years since CCTV ____ to broadcast English programs.
#101693
A
has been; begun
B
is; began
C
is; has begun
D
was; began
推荐题目
The pupils here_____ all kinds of exercises every day in the past few weeks. 
#104326
A
keptbusydoing
B
keepondoing
C
havekeptbusydoing
D
havebeenkeptbusydoing
Had I known the party was so boring, I wouldn’t have come. I __anything.
#100793
A
hadn’t done
B
haven’t done
C
didn’t do
D
wouldn’t do
 Now we have arrived at the lake. But the view I photographed that day ________ any more.
#99469
A
doesn't exist
B
isn't existing
C
hasn't existed
D
hadn't existed