15. It's already 10 o' clock. I wonder how it_________ that she was two hours late on
such a short trip.
.
| A．came over | B．came out | C．came about | D．came up |
-Your mum is very kind. 
-Yeah, My mum is pretty considerate, you know what_____ ,she always arranges everything around me.
| A．she means | B．you mean | C．I mean | D．we mean |
For a moment nothing happened Thenall shouting together.
| A． | voices had come | B． | came voices | C． | voices would come | D． | did voices come |
It’s helpful to put children in a situation ______ they can see themselves differently.
| A．that | B．when | C．which | D．where |
-How amazing it is that astronauts are exploring outer space!
-It’s a challenge, I guess, ______ man against nature.
| A．of | B．for | C．by | D．about |
-Why does the Lake smell terrible?
-Because large quantities of water.
| A． | have polluted | B． | is being polluted | C． | has been polluted | D． | have been polluted |