Scientists are trying their best to_______ ways to treat the terrible disease caused by Ebola(埃博拉）．
| A．come up with | B．look forward to |
| C．talk about | D．give up |
Tom is of the two boys.
| A．tallest | B．taller |
| C．the taller | D．the tallest |
He is honest boy. And he is student in our class.
| A．a, better | B．an, best |
| C．the, the best | D．an, the best |
--- ______ do you play softball after school?
--- Twice a week.
| A．How long | B．How soon |
| C．How often | D．How much |
--- Is the Changjiang River in the world?
--- No, it isn’t.
| A．very long | B．longer |
| C．the longest | D．longest |
Tom often tells lies, but they always make us .
| A．believe | B．to believe |
| C．believes | D．believing |