1.-Did Jack come back early last night?
-yes.i was not yet 8 o'clock——he arrived home
A.when B.before c.that D.until
2.That was really a splendid night.It's years__I enjoyedmyself so much.
A.when B.before C.that D.since
3.It maybe 5 years__it is possible to test this machince.
A.since B.before C.that D.when