Today, we’ll discuss a number of cases ____parents have much difficulty in communicating with their children.

Now let me tell you the work I have been doing with them. My job with the UN is not paid, but voluntary and as I said _______, I mainly visit countries where the UN has programs to help people. 

—How can I wake up that early? —Set the alarm at 3 o’clock, ________ you’ll make it.

The young couple are trying to save as much as possible ________ they can afford a flat by the end of next year．

My parents live in a small village. They always keep candles in the house ___ there is a power cut.