It is going to rain today.Take an umbrella with you to _____ you from the rain.
Do you know the reason _______ he was late?
I’ll take you to the museum ______ you may see everything _________ you want.
Is oxygen the only gas ________ helps fire burn?
The number of the people present at the concert was _____ than expected. There were many tickets left.
The silk road, _______ Marco entered China, was important for the exchange of goods and ideas.