Bob often ____ his mother with the housework on Sundays.

Throughout_______ history, English language has gone through many changes.

The teacher told the students________ football on the street.

《白雪歌送武判官归京》属于()。

-What would you like to drink, tea or juice?

-_______ is OK. They are both my favourite.

中唐倡导新乐府运动的诗人是()。

_ crowded orders. we have sold out all the goods scheduled for shipment within this year.

If business had been carried out to our satisfaction, we _ to renew the Agency Agreement.

According to UCP 600, the confirming bank must negotiate and/or honor ( )

Under no circumstances, _ goods on their own account.