Only by shouting at the top of his voice ____________.
| A．he was able to make himself hear | B．he was able to make himself heard |
| C．was he able to make himself hear | D．was he able to make himself heard |
He asked me how much on the mountain bike.
| A．did I pay | B．I paid |
| C．had I paid | D．I had paid |
With our knowledge practice , we can make contribution to our society.
| A．to base on | B．basing on |
| C．based on | D．base on |
—Did the boys break the window ?
—No. They did it when they were playing football.
| A．by accident | B．on purpose |
| C．at dusk | D．as usual |
Jerry is so that he won’t listen to anyone’s advice once he had made up his mind.
| A．determined | B．stubborn |
| C．reliable | D．concerned |
—Hi, Bob, are you going to attend tomorrow’s conference?
—Oh, I’m afraid not,invited to.
| A．even if | B．as if | C．if | D．since |