Thank you for giving me a hand. I ______ in the experiment without your valuable help.
Electricity, like other forms of ______, has greatly increased in price in recent years.
—Hello, I’d like to speak to Henry. —Oh, which _______? There are two ______ in our office.
Jim was late for two classes this morning. He said that he forgot both of the ______.
—How can I use this washing machine? —Well, just refer to the _______.
You’ve just missed your ______, and you will have to wait for the next round.