new graduate, he doesn’tknow_______it takes to start a business here

ea of fish being able to produceelectricity strong enough to light a lamp is almost unbelievable, _____ severalkinds of fish are really able to do this.

You must be looking forward to your tripto Sydney— Yes I waitany longer

下列选项中，不含通假字的一项是

Don’t call me at the office ________ it is necessary.