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On leaving the market place, my mother was pleased ___herself ___having discovered a real bargain.
A。at at B. with at C.with for d. at for
第二选项中为什么at 而不用for
He gave me the phone number in order ___me to contact him when we are ___need ___ help.
A. for in of b. to at for c. by on to d. for in for
为什么不是in order to for help?
Would you like to join our team?
How many people are there ___ your football team?
a. in b. at c. on d. with
为什么这里用on ?
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