1.   As work continues to reduce the gestation period at which screening tests can be conducted, the practical problems will Decrease.

2.   Ever since then, people have been conducting tests upon different generations of sound recording systems.

3.   Investigators will be conducting tests to determine how the man died.

4.   It was therefore inadvisable to conduct statistical tests when missing data from some schools distorted the representativeness of the sample.

5.   Only three are suspected of having conducted a test.

6.   Tests were conducted to ascertain whether pollution levels have dropped.

7.   We wanted to find out so we conducted a test at a local shopping mall.