be worried about his safety______, he is aneighteen-year-old young man

I’m expecting a digital camera for long, but dad has no time to buy ______ for me.

Look at the sign on the right. — Oh, parking here.

下列四个选项中对加点实词的解释全都正确的一项是（ ）

下列各句中，没有语病的一项是