Now China has joined WTO（世贸组织）, so I think English is________ useful than before.
Can you tell us what to do next, Miss White?— Please turn to Page _____ and look at the _____ picture.
Are you going to buy a camera? —–Yes. But there are so many kinds that I can’t decide __________ to buy.
Has Jack finished painting the picture yet?— I’ve no idea. But he______ it the whole afternoon.
I’ve worked with child before, so I know what ________ in my new job.