—Have you finished your first paper? -- . Just half of it. How about you?
Attention, please. All of you students _______ remain in their seats until all the papers have been collected.
____ it rain tomorrow, we would have to put off the visit to the Yangpu Bridge.
Whoever is never ______ with the progress he has made will be a success.
Canada is a country ________ many different nationalities as well as one with foreign immigrants __________ the majority of its population.
It wasn’t until dark _________ he found _________ he thought was the correct way to solve the problem.