Not only he but also I ______ able to solve this kind of problem. 

Nowadays, either 21st Century or other English newspapers _____ increasingly popular among us students.

Either you or one of your students ______ to attend the meeting that is due tomorrow.

–Where _______ the socks?   --_______ on the bed.

Listening to peaceful music.  as well as taking exercise,___________ a lot in relieving people 's sad emotions.