The twin sisters look so much alike that I could never tell _____.

—Do you like the material? —Yes, it （ ） very soft.

The committee is expected to_____a decision this evening.

You needn’t introduce him to me. I’ve met him on several _____.

Three of us will go there, and the rest （ ） to stay here.

Only when （ ） in the afternoon （ ） able to leave.

If I had remembered （ ） the window, the thief would not have got in.

The defense computers calculate way to （ ） the enemy missiles.

I recognized John （ ） he entered the room.

John Smith, a diligent student, never refuses to （ ） more responsibilities that are assigned to him.

____________ , we will review all the lessons before the final exam.

My university lies in the north of the city, around （ ） high mountains.