The thief was brought in with his hands ________behind his back
| A．to be tied | B．tied | C． being tied | D．tie |
He is teaching me French __________ my teaching him Chinese.
| A．in place of | B．in case of |
| C．in exchange for | D．in honor of |
The committee __________ over the problem among themselves for two hours.
| A．has argued | B．has been arguing |
| C．have argued | D．have been arguing |
—Liu Fang, I don't know you can play the Pipa and Guzheng so well.
—Well, actually I __________ it since I was six years old.
| A．plays | B．have been playing |
| C．played | D．had been playing |
Betty and Louis __________ with each other at first sight and they __________ in love for five years ever since.
| A．fell in love; have been | B．fell in love; have fallen |
| C．were in love; have been | D．were in love; have fallen |
I like these English songs and they __________ many times on the radio.
| A．taught | B．have taught |
| C．are taught | D．have been taught |