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 |
—Hi，Jack！I'm glad I came across you here.
—________，Alice?
| A．Who is that speaking |
| B．How about another cup of tea |
| C．Why？What's up |
| D．What can I do for you |
A：I prefer western food.It's a kind of healthy food.
B：________？But western food is said to be high in sugar and fat.
| A．Is that right | B．How do you know that |
| C．Do you really think so | D．Who told you that |
—I must be off now，or it will be too late to see Tom.
—________？Do you really want to see that dull boy?
| A．So what | B．For him |
| C．Why so | D．For what |
A：Honey，the basketball game is about to start.And could you bring me a bowl of ice cream？ And...uh...a slice of prizza.
B：________？
A．No，that's all for now.
A．What did you say B．Anything else
C．Could I help D．What can I do for you
—Do you think David will fail in the maths exam again?
—________.
| A．No，I don't believe it | B．I hope not |
| C．I expect not | D．I don't suppose it |