_____ teens are using the Internet for both social and intellectual development, they are also facing significant challenges on how to manage their relationships online.
A.Unless B.While C.Once D.Until
— How do you know Jimmy will come out first in the final exam?
— _____. He is always working hard and he is very clever.
A.You are right B.It's my guess C.No wonder D.No offence
Susan has _____ more than 5,000 dollars in the last three months, with which she can buy new bicycles for those poor children.
A.accelerated B.accompanied C.accumulated D.acknowledged
（2018·天津）I didn't mean ___________anything but the ice cream looked so good that I couldn’t help_______ it.
A.to eat；to try B.eating；trying
C.eating；to try D.to eat； trying
If you are _____ a food or drink, you can remove it from your diet.
A.cautious about B.allergic to C.satisfied with D.associated with
— I'm going to Appleby tomorrow.
— _____! I'm going up there, too.
A.Go ahead B.Good luck C.What a coincidence D.Cheer up
