The streets are all wetlt________

单选题The streets are all wetlt_________during the night。
　　A. must be raining
　　B. had to rain
　　C. must have rained
　　D. had rained

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1England’s chief exports are coa1， cars and cotton goods，cars _______the most important of these.
　　A. have been
　　B. are
　　C. be
　　D. being

2Everything was so expensive during the war that it was Hardly __________to save a penny．
　　A．Likely
　　B． feasible
　　C．probable
　　D． possible

3The automation has made it possible to_______ great changes in dustry。．
　　A． bring about
　　B． bring down
　　C． bring out
　　D．bring up