you look puzzled, Have youunderstood it—Yes．I _____another problem just now．

下列各句中，没有语病的一句是（ ）

If you want to go there,_____. [ ]

John as well as the other staff members who________working with this worldfamous company________to attend its 100th anniversary. [ ]

It takes ________ half an hour _________ his homework every day.