_____ when I saw him the second time _____ how handsome he was.[ ]

________ very confused，thelittle girl looked up the information in the book to find out the answer

__world, where computers rule ourwork and life, online searches have become _____necessity

Effective measures have been taken to prevent _______pollution.

I did well in the English exam last week.—- I did _____ . I got a full mark.