Why ______ a bad idea to ask Amy for advice?

The man called his professor for help because hecouldn’t solve the problem by _________.

Today, we’ll discuss a number of cases ____ parents have much difficulty in communicatingwith their children[ ]

We ______ the difficulty together, but why didn’t you tell me?

In Kenya’s vast Tsavo National Park, breeding herds of elephants are a common sight, the new babies hurrying to_______ their mothers.