Choose the best option

48. We _____________ for their answer for two months already
A. wait
B. are waiting
C. have been waited
D. have been waiting
49. She _____________ since Monday.
A. is sick
B. is being sick
C. has been sick
D. has been being sick
50. She _____________ since noon. Should we wake her up?
A. sleeps
B. is sleeping
C. has been sleep
D. has been sleeping