We were swimming in the lake _____ suddenly the storm started.
A．when B．while C．until D．before
Alice didn’t want her parents to know .
A．what has she done B．what was she doing
C．how she had done D．what she was doing
It took building supplies to construct these energy-saving houses. It took brains, too.
A．other than B．more than C．rather than D．less than
Every evening after dinner, if not from work, I will spend some time walking my dog.
A．being tired B．tiring C．tired D．to be tired
—I don’t know if Tom will attend the party until now.
— Really? Tom is eager to do so.
A．In the end B．As a result C．On purpose D．Believe it or not
Few countries the independence of that country.
A．realize B．recognize C．receive D．announce
