`26.` As the aircraft approached the airfield, the pilot began to lower the altitude and _____________ to make a smooth landing on the runway. A. throttle down B. churn out C. blast off D. knuckle under `27.` Those having the _____________ are more likely to escape unharmed from hazardous situations. A. period piece B. corn circle C. horse sense D. common touch `28.` The ships won't be allowed to set sail if the storm shows no signs of _____________ . A. abetting B. abating C. affixing D. abutting