Did you get there by ______ bike?—No, I took ______ taxi.

The following chapters provide step-by-step instructions for practical _______ of genetic (基因)engineering to agriculture.

Tom’s father, as well as his brothers, ________ in New York for a few more days.

Jim received a present from his friend, but he didn’t _________ it.

I usually ______ sunglasses outside in the sun.