As we know, penicillin became the greatest drug of the 20th century, _____

As we know, penicillin became the greatest drug of the 20th century, ______ millions of lives.

#95101

to save

saving

saved

Save

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The country has already sent up three unmanned spacecraft, the most recent ________ at the end of last March.

#95330

has been launched

having been launched

being launched

to be launched

 Jin Yong, whose name is always closely ________ with kungfu novels, is a famous writer in Hong Kong.

#91963

considered

subscribed

associated

“Shall I give the dog a chocolate?” “It’s better _________.”

#94056

not to

to not

don’t

can’t

—Good morning，Bill． —Did you have any trouble _____ through the snow？

#98391

driving

to drive

drive

drove

 ______ quickly, and you will be able to catch the train.

#89754

To get up

Getting up

Get up

If you get up

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