Questions 16-19
        There are germs everywhere in the house. Take the sponge you use to do the dishes for example._(16)_ you put soap on it, it can still contain germs. Fortunately, there is an easy solution for this. Allyou need to do is putting it in the microwave for two minutes. The _(17)_ will kill most of the bacteria.A cutting board can hid germs as well, which grow after knives leave deep marks in it. It is also a goodidea to use a separate one for _(18)_ meat. _(19)_ the toilet can send bacteria into the air, too.Therefore, it’s safer to put the lid down before pushing the lever.
【題組】16.
(A)Since
(B)Even though
(C)In case
(D)Unless