The words _______________ if you don’t go over them for several days

7．The result was far beyond_______we had expected, brought great joy to every one of us

Nowadays people are expecting more environmentally friendly and energy-saving products to be____________.[ ]

The lad couldn’t ______ even if he______ in time

You shouldn’t have the machines _____all the while; you ought to have them _____now and then.[ ]