elen saw her tutor nod ______ to her,she calmed down and went on with her performance .

Where have you been recently?—I ______ in Hangzhou on business for a week last month.[ ]

__Waiter,what about my food?I________for over 30minutes.__Oh,sorry,sir.Just one more minute,please.[ ]

______ throughout the garden are beautiful flowers of all kinds.

He________ his experiments and made a great contributionto our country.[ ]