问题

_____ 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:OnceDUntil
D:Until

正确答案是：

同类题型

, my daughter takes great interest in most ofthe food on the menu. — Thanks. ______ Salad, fried fish, chips and orange juice, please.

When I was at college I ___ threee foreign languages, but I ___ all except a few words of each

依次填入下面一段文字横线处的语句，衔接最恰当的一组是（）；。，，，，便不知不觉中迁就迎合，逐渐损失了思想和创作的自主权。有自尊心的人应当对不虞之誉跟求全之毁同样的不屑理会—一不过人的虚荣心总胜于他的骄傲。①但是赞美很可能跟毁骂一样的盲目，而且往往对作家心理上的影响更坏 ②我们要保持这种不该接受的赞美 ③因为赞美是无形的贿赂，没有白受的道理④要常博得这些人的虽不中肯而颇中听的赞美⑤作品有人赞美，我们无不欣然引为知音⑥作品遭人毁骂，我们常能置之不理，说人家误解了我们或根本不了解我们

_____makes this shop different is that itoffers more personal services．

Do you think we are going the right way to the Forbidden City? —Sorry, I’m not sure．But it _______ be．