91. ______ finding solutions, it is unthinkable to solve all the problems the same way throughout the country.
| A．As if | B．As of | C．As for | D．As against |
----When did the concert _____?
---Well, two or three years ago?
| A．happen | B．take place | C．hold | D．start |
-- Not getting that job was a big bet down.
---Don’t worry. Something better will ____.
A. come along B. take on C. go by C. fall behind
---Mum, it is nice weather. I want to skate this afternoon.
---Don’t you think the ice on the lake is too thin to___ your weight?
| A．stand | B．bear | C．catch | D．take |
Tom, ____ yourself. Did you forget the school rules?
| A．behave | B．believe | C．perform | D．conduct |
The boy was made to___ the explanation(解释，说明 process of explaining) .
| A．speak | B．tell | C．repeat | D．say |