【C5】A．consumedB．conductedC．engagedD．attracted

A． revealedB． exposedC． engagedD． involved

A．joinB．earnC．bringD．attract

A．startedB．conductedC．replacedD．proposed

They were determined to carry out the research at once.A.fetchedB.conductedC.attractedD.pu

【C11】A．devotedB．takenC．engagedD．fixed

【C8】A．involvedB．investigatedC．engagedD．experienced