It was my sister ________ first had the idea to cycle along the entire Mekong River.

 —Isn’t it time you _______ down to _______ your own things? —I’m sorry for the delay, Dad.

The influence of this book might not have been reaching so far, ________for Mr. William, who dared to publish it.

I don’t remember how many years ago ______________I paid my last visit to the principle of my primary school.

 Rather than _____ a bus to her workplace, Susan prefers ______ a taxi.