The play has been on for two hours so the audiences are very tired. {A; B; C}A. 这部剧

The footballer has been bouncing the ball for hours on end, and appears capable of more ho

My father has been on the salary schedule in this factory for nearly 20 years.A.pay packe

In order to control the population, China has been on the policy of birth control for many

He has been for five years.A. in prisonB.in the prisonC.on prisonD.at the prison

For 20 months the wrecked Costa Concordia has been lying on its side near the coast of Gig

The strike has been on for half a year;______ there is a severe decline in production.A．ac