在探究“光对鼠妇生活的影响”这一实验过程中,实验变量是()
( ) How _______are your feet? I wear size 19. A.big B.long C.heavy
( ) Mike _____his clothes everyday. A. wash B.washes C.washed
( ) What did you do yesterday? ----- I _____skiing. A. go B.goed C.went
( ) It’s raining outside. Tom______bored. A. feel B. does C. feels
( ) The ola man _______ a headache, and his son ______ sad. A. has, isB. have, feelsC. has , feeling