IT WAS NOT UNTIL 1937 ________ THE SOUTHERN MOST SOURCE OF THE NILE...
3. It was not until 1937 ________ the southern most source of the Nile River was discovered.
A. when
B. which
C. that
D. while
3. It was not until 1937 ________ the southern most source of the Nile River was discovered.
A. when
B. which
C. that
D. while