—I do believe the scientific explanation that when a tomb is opened, the fresh air disturbs the viruses inside it. What about you?
—So do I. If _______ in, the disturbed viruses may cause illness or even death.
| A．breathing | B．breathed | C．being breathed | D．to breathe |
I lost my way in complete darkness and, matters worse, it began to rain．
| A．made | B．having made | C．making | D．to make |
She had golden hair when she was a child, but_________ she got older and older, her hair went darker and darker．
| A．while | B．when | C．after | D．as |
___________she was invited to the ball made her very happy．
| A．If | B．That | C．When | D．Because |
—ou___________ stop me．
—Even if you __________it, I won't allow you to swim across the river．
| A．mustn't; dare not do | B．may ; dare not do |
| C．can; dare to do | D．needn't; dare do |
What a pity! He____________ the only chance of success．
| A．threw away | B．put down | C．gave in | D．broke off |