We may not know how to use the ____ when we need to contact

We may not know how to use the ____ when we need to contact we may not know how to buy the things we need译成汉语 We may not know how to use the telephone in the country whic We may not know ( ) to use the telephone in the country we a 1.We not know how to use the telephone in the country which we may find how much we like new people when we get to know we do not know when man first began to use salt,but we do kn 英语翻译We do not know when man first began to use salt,but we d when we use metals it is important to know how they how they When we feel ____,we may not want to eat.A.worry or excite B 英语翻译To work out the funding we first need to know how it wil when we meet the right one,we will know how to be grateful.