it was not__he learned of his daughter's being admitted into that university__he felt very happyA.until;that B.\;since C.until;when D.when; then

it was not__he learned of his daughter's being admitted into that university__he felt very happyA.until;that B.\;since C.until;when D.when; then
it was not__he learned of his daughter's being admitted into that university__he felt very happy
A.until;that B.\;since C.until;when D.when; then

it was not__he learned of his daughter's being admitted into that university__he felt very happyA.until;that B.\;since C.until;when D.when; then
选A
首先原句释义：直到他了解到他的女儿被那所大学接纳了他才感到非常高兴.
然后not until是固定短语,意为直到……才,不到……不
It was……that则是强调句型,常考