`1.` The beauty of the scenery in the park _____________ (strike) us as soon as we entered. `2.` The cake should _____________ (eat) by now, but it was left untouched on the counter. `3.` The concert might _____________ (cancel) due to the rain, but they moved it indoors instead. `4.` By the time I arrived, they _____________ (study) for the exam for days on end.