Not until quite recently _____ any idea of what a guided rocket is like.

As a matter of fact, they would rather leave for Beijing than _____ in Shanghai.

The manager urged his staff not to （ ） the precious opportunity.

A new technique （ ）, the output as a whole increased by 20 percent.

—Do you know （ ） they got to know each other? —It was last year （ ）they both taught Chinese in Scotland.

I have no objection （ ） your design for the new type of machine this time.

Such problems （ ） air pollution and traffic jams are becoming more and more serious in some big cities.

No sooner _____ stepped out of the hall than it began to rain.

She heard a continual strange noise coming from the next room, her heart （ ） fast.

These tickets for the performance are （ ） until the end of the month．

Words_____meaning, as we all know.

The weather was good except for an （ ） shower.