In our life, one question that ____ comes up is:“to be or not to be?”

(2013 ·湖北武汉武昌高三联考)Smiling doesn't ________ mean you're happy.Sometimes, it just means that you're strong enough to face problems.

–You seemed to have been impressed by his songs.--Well, not exactly so. It was his way of singing _____his voice that really impressed me.

I can't tell you the exact when I will get there ____, I’ll be there as early as I can.

Last night Mr. Crook didn’t come back at the usual time. ______，he met some friends and stayed out until midnight.