No one responded when Tom was speaking, so he paused _______ before continuing to draw our attention.
President Nixon was deeply_____in the Water Gate problem at that time.
--What do you want to do next?We have half an hour until the baseball game.----_____.Whatever you want to do is fine with me.
Don’t pretend _____.Look!You are holding your English book upside down.
Entering the room,I found Mary_____at the desk and_____a letter.
However,the incident was the only spark_____the fire.