（1）. Soccer players have strong legs __________ because they run a lot. ____________
（2）.I __________ go to the party, but I’m not sure. ____________
（3）. Headaches are not __________. ____________
（4）. Airplane pilots need to be __________ on the job. ____________
（5）. A kiwi is a bird. __________, it doesn’t have wings. ____________
（6）. Children can’t sleep when they are __________. ____________
（7）. He doesn’t like to swim in __________ water. ____________
（8）. Swimmers are tired after a long __________. ____________
（9）. Do you breathe __________ when you are afraid? ____________
（10）. Do you cover your mouth when you __________? ____________
（11）. You should __________ in the morning. It’s good for your muscles. ____________
（12）. He thinks traveling is __________, but I think it’s exciting. ____________