[ Grammar ]
________their children go to university, they will sell their house an travel around the world.
A. After
B. When
C. Once
D. All are correct

Random Topics:
Adjective & AdverbsPresent Perfect Simple and ContinuousPresent Simple ProgressiveGrammar: Have toWill, Be going to, Present ContinuousTOEFL GrammarPast TenseIntermediateStative Verbs and TensesGerunds + To InfinitiveOther quiz:
Grammar › ViewHe ___ attend the meeting last Monday.
A. have to
B. has to
C. had to
D. having to
Grammar › View
________ English people love fish and chips.
A. The
B. No article
C. A
D. An
Grammar › ViewIn the forest, all the _____________ branches were waving in the wind.
A. tree’s
B. trees’
Past Perfect or Past Perfect Continuous › View
When I came to the quay, our ship ________ for a few minutes.
A. had sailed
B. had been sailing
C. had sail
