The main cause of locust disaster is the large number of locusts

The following animals who can emit and use ultrasound is ( ). A: bat B: mouse C: grasshopper D: locust

Locust-patrolling pilots in Kenya, Ethiopia and Somalia flew the equivalent of three times the _______ of the globe last month. A: quantity B: volume C: circumference D: length

The US military says the joint military action is aimed to _______. A: drive off Iraqi planes in the no-fly zone B: ensure a safe environment for planes patrolling the no-fly zone C: wipe out Iraqi air force D: support anti-government groups in Iraq