题一：
_____ basic first-aid techniques will help you respond quickly to emergencies.
A. Known B. Having known C. Knowing D. Being known
题二：
Anyone, once ____ positive for H7N9 flu virus, will receive free medical treatment from our government.
A. to be tested B. being tested C. tested D. to test
题三：
I got to the office earlier that day, ______ the 7:30 train from Paddington.
A. caught B. to have caught C. to catch D. having caught
题四：
The driver wanted to park his car near the roadside but was asked by the police_____.
A. not to do B. not to C. not do D. do not
题五：
Lionel Messi, _____ the record for the most goals in a calendar year, is considered the most talented football player in Europe.
A. set B. setting C. to set D. having set
