It is reported that the US uses ________energy as the whole of Europe.
| A．twice as much | B．twice as | C．twice more | D．as twice |
A public health campaign _____ the number of heart disease deaths by 80 percent over the past three decades．
| A．had reduced | B．had been reduced |
| C．has reduced | D．has been reduced |
If it _____ earlier, the printing machine would not have broken down．
| A．has been repaired | B．is repaired |
| C．had been repaired | D．was repaired |
—Congratulations！I hear you’ve won the first prize in the singing competition．—You _____ be mistaken．I’m in the dance class．
| A．must | B．may | C．should | D．could |
She doesn’t speak our language, _____ she seems to understand what we say．
| A．for | B．and | C．yet | D．or |
Oh！I can feel something _____ up my leg！It must be an insect．
| A．to climb | B．climbing |
| C．climb | D．climbed |