Social practice is an opportunity for students to gain a better understanding of_____ society operates.
| A．when | B．what | C．how | D．whether |
.
Steven Hawking’s conclusion about the Black Hole is a little , but it has been accepted by most of the world.
| A．realistic | B．abstract | C．contemporary | D．appropriate |
.
_____ matters most in learning English is enough practice.
| A．what | B．why | C．how | D．Which |
.
If I a quarrel with him yesterday, we together now.
| A．hadn’t had; would stay | B．haven’t had; would have stayed |
| C．didn’t have; would stay | D．hadn’t had; would have stayed |
.
It _____ have been Tom that parked the car here, as he is the only one with a car.
| A．may | B．can | C．must | D．should |
.
Though money, his parents managed to send him to university.
| A．lacked | B．lacking of | C．lacking | D．lacked in |