Don’t let the child who is ________ go to school．
| A．so young as to | B．not old enough to | C．not old enough | D．too young to |
The other day, when I was wandering in the street I ________ one of my old friend, Jim.
| A．came over | B．came across | C．came up to | D．came around |
Though we spent a lot, we think it _____ because we succeeded in the end.
| A．worth | B．worth being spent | C．worthy of | D．worthwhile |
The conference has been held to discuss the ________of global warming on people’s lives all over the world.
| A．importance | B．effects | C．protection | D．impression |
At the railway station，the mother waved goodbye to her daughter until the train was________.
| A．out of sight | B．out of reach | C．out of order | D．out of place |
________by a group of children，the old man was delighted.
| A．To be surrounded | B．Surrounding | C．Surrounded | D．To be surrounding |