题目内容

Since the beginning of 2013, these regulations ______________ in most workplaces across the country.（2016年12月第28题）

A. will be introduced
B. are introduced
C. have been introduced
D. were introduced

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It seems that the suggestion ________________ at yesterday's meeting doesn't sound practical.（2015年6月第23题）

A. make
B. made
C. to be made
D. making

The key point of his speech was that we should take effective measures ______________water pollution.（2019年12月第21题）

A. stopping
B. stop
C. stopped
D. to stop

So far our company __________________exceptional lawn services to residential and commercial customers for 20 years.（2019年12月第22题）

A. will provide
B. had provided
C. provided
D. has provided

Not until I got to the airport _______________ that my passport was missing.（2019年12月第24题）

A. had I realized
B. will I realize
C. I will realize
D. I had realized