Sweet snacks can give us some energy, _______they are not healthy.

_______ and see how long you can ______it. [ ]

I often have ____ egg and a glass of milk for ____ breakfast every day.

The government of the United States began at once toinvestigate the case ______ a lot of students were killed.

ys followed the marks that they ________, untilfinally they found their way back to the campsite.