But, in our enthusiasm to discover our heritage, we are ruining the very scenery we go to enjoy, damaging natural habitats, ______ down footpaths, disturbing wildlife, polluting the air and dropping litter.

The custom is ______ in the belief that a new pregnancy...

单项选择题The custom is ______ in the belief that a new pregnancy—through its detrimental effect on breastfeeding—would endanger the mother's health.

Did he really expect her to smile now and ______ with h...

单项选择题Did he really expect her to smile now and ______ with his plans, treat all this deception as no more than an unusual diversion