题一：
Maria has written two novels, both of ________ have been made into television series.
A. them B. that C. which D. what
题二：
The air quality in the city, ________is shown in the report, has improved over the past two months.
A. that B. it C. as D. what
题三：
When deeply absorbed in work, ______ he ofte n was, he would forget all about eating or sleeping.
A. that B. which C. where D. when
题四：
—We’ll take the conditions into careful consideration________ you have attached to this contract.
—Thanks. Hope for further cooperation.
A. as B. which C. where D. what
题五：
Do you remember a certain occasion ____ you were in trouble and at that moment I gave you a hand？
A. where B. which C. why D. when
