–Have you been wasting time oncomputer games again– _______ I’ve been studying a lot and Ineed a break

_____ how mirrors produce image, we need to know what light does. [ ]

Her love story ____ our hearts with sorrow.[ ]

There are flowers in our school and I like them .

If you _____ his wife’s income____his own，the totalof their income _____ 3000 yuan.