---Dad, must we wait until the light becomes green?---Yes,I’m afraid we      .That’s the traffic rule.

 Some people ________ not have plans yet for New Year’s Eve, but others know exactly what they will be doing.

(2013·辽宁，31)Harry is feeling uncomfortable.He________too much at the party last night.

Oh, I’m not feeling well in the stomach. I _________ so much mushroom this morning.

Brain, like muscles, also needs some kind of exercise and nutrition. The more you use your brain in the right direction, the more you ________ enhance your ability.