Bob, can you see the boys over there are my cousins. Let’s go and say hello to them.

We must________the weather into consideration first when climbing mountains.[ ]

Which of the two coats will you take—I’ll take________ of them，because I don’t like the colours.

Your house looks so beautiful! When did you buy it—I _________ since half a year ago.

With the help of his classmates, he ___________the difficult maths problems easily.