1.   Doctors did several tests to find out what was wrong.

2.   He let me do lab tests sometimes.

3.   I was sitting in front of my easel at about quarter to nine, doing preliminary tests on a little panel-picture of a City church.

4.   The doctor did some tests.

5.   The drug tests have been done so far only in fruit flies.

6.   To confirm my diagnosis I need to do some tests.

7.   The test was done under controlled conditions.

8.   The test was done in both erect and supine positions.

9.   The test was done in the fasting state.