It is a rule in his family that ______ comes home earlier should cook the dinner for the family.
The open-air celebration has been put off _______ the bad weather.
Many of them turn a deaf ear to his advice, _____ they knew it to be valuable.
I’d like to study law at university __________ my cousin prefers geography.
Some students often listen to music _____ classes to refresh themselves.
.—____ when has the country been open to international trade? —1978, I suppose.