Question

Put the verbs in brackets in the correcy form of the present perfect simple or present perfect continuous.

Scientists say they............................(discover) a new wonder drug thtat can help people lose weight without having to diet or take exercise.They.........................(test) the drug on laboratory rats for the pas year and say they.......................(have) good results."We.....................(not/start) testing the drug on humans yet, but it won't be long before we do", said professor higgins.Although research.............................(show) that there may be a market for the new wonder drug, dietician Rosemary connors is against the idea. She says, "the only safe wy to lose weight...............................(alwasy/be) a balanced diet and regular exercise."

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Answer 1

have discovered

have been testing

have been having

haven't tested

has shown

has always been

Answer 2

Scientists say they have discovered a new wonder drug thtat can help people lose weight without having to diet or take exercise.They have been testing the drug on laboratory rats for the pas year and say they have had good results."We haven't started testing the drug on humans yet, but it won't be long before we do", said professor higgins.Although research has shown that there may be a market for the new wonder drug, dietician Rosemary connors is against the idea. She says, "the only safe way to lose weight has always been a balanced diet and regular exercise."