The traffic rule says young children under the age of four and ____ less than 40 pounds must be in a child safety seat．
| A．being weighed | B．to weigh | C．weighed | D．weighing |
I want to catch _____ early train, but couldn’t get _____ ride to the station.
| A．an; the | B．\; the | C．an; \ | D．the; a |
Sitting alone by the window, all the memories __________ .
| A．clouded in | B．clouded with | C．crowded in | D．crowded with |
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 |