Look! He’s running so fast!— Hard to _____ his legs were once broken. [ ]

The number of children who___________ both parents to Aids ________ also expected to rise, reaching more than 26 million in 2010.

Because they usually receive the same score in the exams, there’s often disagreement as to ______ is the better student, John or Mary.

─Compare the speeches made by the students from different schools，and you will find Frank’s is .─Sure. That’s why we voted for him.

Kathy ______ a lot of Spanish by playing with the native boys and girls