Professor Johnson is said _____ some significant advance in his research in the past years.
A、havingmadeC
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Toobtainasatisfactoryresult，onemustapplytwo（）ofpaintonacleansurface.
HismannerwassopleasantthatBollafeltat（）withhimatonce.
Ininternationalmatches,prestigeissoimportantthattheonlythingthatmattersistoavoid_____.
_____himtomorrow.
Thethreementriedmanytimestosneakacrosstheborderintotheneighboringcountry_____bythepoliceeachtime.
