问题

We need to be______ the long-term effect of playing computer games too much on children.

A:concerned about
B:amazed at
C:threatened by
D:tired of;

正确答案是：

同类题型

The new mobile phone can tell me ____________ if I getlost.

Did he getwhenhe did the simple andjob

ere any English Story books for us students in the library-There are only a few, _____.

lice are offering ______ reward of$50,000 for information leading to the arrest of _____ murderer

Charles Dickens, a famous 19th- century writer, wrote many popular novels, __________ Oliver Twist is a good example.