The telephone system _________ during the big earthquake in Sichuan Province.
The animal makes a strange sound, slightly ______ the bark of a dog.
You got back so late and you didn’t even give me a proper reason _______ you hadn’t called me! I’m very unhappy with you.
There was a big dog ______ in front of Mr. Hill’s house, so David didn’t dare to go near it.
The tourists can not help wondering ______ the ancient people could manage to complete the magnificent building without modern equipment.
We have no choice. _______ we go or we stay, the result is the same.