We finished the run in less than half the time ____.
| A．allowing | B．to allow | C．allowed | D．allows |
Miss Sullivan clarified the science Project in Simple but vivid language so as to make it easier for teenagers ________.
| A．understanding | B．to understand | C．understood | D．to be understood |
I'm really concerned ahout you. If something _______ happen to you call me at once.
| A．would | B．should | C．could | D．might |
How could she be so calm in front of so many people? It is really _______me.
| A．across | B． against | C．beyond | D．over |
-Did you reach the US the next day?
- No. Somehow . it was three days_______ I arrived there.
| A．since | B．when | C．that | D．before |
It is so cold here in Zhengzhou this winter that it seems as if we ______ in Iceland.
| A．are | B．have been | C．were | D．had been |