Our research has focused on a drug which is so _____ as to be able to change brain chemistry.
| A．powerful | B．influential | C．monstrous | D．vigorous |
In our school only teachers are allowed to use this room. And only in this room __ find some good dictionaries.
| A．we can | B．can we | C．are able we to | D．we are able to |
My friend, Tom, bought __ oar.
| A．a fairly good | B．fairly a good | C．fairly good a | D．rather good a |
Please come here ___ four days.
| A．each | B．every | C．for | D．to |
“Mom, I am full.I can’t eat any ___.”
| A．longer | B．more | C．much | D．long |
Don’t be afraid ___ mistakes when you speak English.
| A．to make | B．of making | C．that make | D．making |