It should be hard to ______ a position of great influence. A: adjoin B: attain C: absorb D: adhere

In which of the four words, the prefix "ad" means "toward"?( ) A: adventure B: adoapt C: advertisement D: adjoin

A square is a flat area having four sides, any adjacent two sides of which ______ a right angle. A: make B: advocate C: adjoin D: shape