According to Charles Keeling, the amount of carbon dioxide ________ sharply and steadily over the forty years between 1957 and 1997.
| A．increased | B．had increased |
| C．had been increased | D．was increasing |
___________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 |
He__________ he would be able to leave tomorrow, but it's beginning to took difficult．
| A．hopes | B．was hoping | C．had hoped | D．hoped |
—I put him down for a well-educated man．
—___________ ?
—I mean that he's a well-educated man．
| A．I beg your pardon | B．Speak louder, will you |
| C．What's that | D．Will you repeat word for word |
The meeting lasted till late ______.
| A．into night | B．at night | C．into the night | D．at the night |