It was years _____ I had visited my hometown in Dalian, Liaoning Province.
| A．after | B．that | C．since | D．when |
The work is not very profitable _______ cash, but I am getting valuable experience from it.
| A．in favor of | B．in terms of |
| C．in charge of | D．in case of |
At last the determination and patience of the scientists _______in 1996 with a breakthrough -------- the cloning of Dolly the sheep.
| A．paid off | B．paid out | C．paid back | D．paid up |
I don’t think he will make a superstar like Cristiano Ronaldo. He just lacksit takes to be a professional soccer player.
| A．Which | B．that | C．what | D．who |
It is______ that he has been addicted to the drugs and has difficulty quitting it.
| A．obviously | B．apparently | C．possibly | D．likely |
Many air flights _________because of the eruption of the volcano, in _______case, many passengers had no choice but to take a train.
| A．had been cancelled; which | B．have been cancelled; what |
| C．had been canceling; that | D．have been canceling; where |