I called Mary many times yesterday evening. But I couldn’t get through. Her brother _____ on the phone all the time.

.With that trust ____ to serve all Americans and I will do my best to fulfill that duty every day as your President.

Our physics teacher told us that light _______ faster than sound.

The reason ______ the delay is ______ we have had difficulty in obtaining materials.

_______did you go last Saturday ? —- I went to the zoo