Scientists photographed for the first time ever _____ wild gorillas used a stick to test the depth of a pool before getting into it, according to a recent study.
Mr.White works in an import and export company,but he_____for this industrial fair,since he is on leave.
Thanks to the application of new farming methods,output is now six times _____it was before 2000.
Madonna ____a straight A student,but it was dancing that she was really crazy about.
I’m told that languagepractising.com is a free website ____ learners can not only learn various languages but also chat online.
The traditional approach___with complex problems in our studies is to break them down into smaller,more easily managed problems.